$  This file was assembled from a variety of sources over time;
$  it just seeks to compile information for materials to be used in Monte Carlo 
$  particle transport calculations in an easily accessible plain-text format. 
$  The first 372 entries are from the Compendium of Material Composition Data for
$  Radiation Transport Modeling (Rev. 1), PNNL-15870 Rev. 1, published by the
$  Pacific Northwest National Laboratory.  That document can be found at:
$  https://www.pnnl.gov/main/publications/external/technical_reports/PNNL-15870Rev1.pdf
$  The sources for other entries are specified.

$************************************************************
$  1   : A-150 Tissue-Equivalent Plastic (A150TEP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.127000 
$  Total atom density (atoms/b-cm) = 1.169E-01 
$  Composition by atom fraction 
M1         1001  0.583640        $  H-1
           6000  0.374859        $  C
           7014  0.014531        $  N-14
           8016  0.018984        $  O-16
           9019  0.005324        $  F-19
          20000  0.002662        $  Ca
$************************************************************

$************************************************************
$  2   : Acetone 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C3H6O 
$  Molecular weight (g/mole) = 58.07914 
$  Density (g/cm3) = 0.789900 
$  Total atom density (atoms/b-cm) = 8.190E-02 
$  Composition by atom fraction 
M2         1001  0.599985        $  H-1
           6000  0.300013        $  C
           8016  0.100002        $  O-16
$************************************************************

$************************************************************
$  3   : Acetylene 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2H2 
$  Molecular weight (g/mole) = 26.03728 
$  Density (g/cm3) = 0.001097 
$  Total atom density (atoms/b-cm) = 1.015E-04 
$  Composition by atom fraction 
M3         1001  0.499983        $  H-1
           6000  0.500017        $  C
$************************************************************

$************************************************************
$  4   : Air (dry, near sea level) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.001205 
$  Total atom density (atoms/b-cm) = 4.988E-05 
$  Composition by atom fraction 
M4         6000  0.000150        $  C
           7014  0.784431        $  N-14
           8016  0.210748        $  O-16
          18000  0.004671        $  Ar
$************************************************************

$************************************************************
$  5   : Alanine 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.420000 
$  Total atom density (atoms/b-cm) = 1.248E-01 
$  Composition by atom fraction 
M5         1001  0.538450        $  H-1
           6000  0.230778        $  C
           7014  0.076924        $  N-14
           8016  0.153848        $  O-16
$************************************************************

$************************************************************
$  6   : Aluminum 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Al 
$  Molecular weight (g/mole) = 26.981538 
$  Density (g/cm3) = 2.698900 
$  Total atom density (atoms/b-cm) = 6.024E-02 
$  Composition by atom fraction 
M6        13027  1.000000        $  Al-27
$************************************************************

$************************************************************
$  7   : Aluminum Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Al2O3 
$  Molecular weight (g/mole) = 101.961276 
$  Density (g/cm3) = 3.970000 
$  Total atom density (atoms/b-cm) = 1.172E-01 
$  Composition by atom fraction 
M7         8016  0.600000        $  O-16
          13027  0.400000        $  Al-27
$************************************************************

$************************************************************
$  8   : Aluminum, alloy 2024-O 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.780000 
$  Total atom density (atoms/b-cm) = 6.022E-02 
$  Composition by atom fraction 
M8        12000  0.017158        $  Mg
          13027  0.955163        $  Al-27
          14000  0.002801        $  Si
          22000  0.000494        $  Ti
          24000  0.000305        $  Cr
          25055  0.003036        $  Mn-55
          26000  0.001409        $  Fe
          29000  0.019031        $  Cu
          30000  0.000604        $  Zn
$************************************************************

$************************************************************
$  9   : Aluminum, alloy 2090-T83 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.590000 
$  Total atom density (atoms/b-cm) = 6.054E-02 
$  Composition by atom fraction 
M9         3000  0.083519        $  Li
          12000  0.001728        $  Mg
          13027  0.901423        $  Al-27
          14000  0.000596        $  Si
          22000  0.000527        $  Ti
          24000  0.000164        $  Cr
          25055  0.000155        $  Mn-55
          26000  0.000360        $  Fe
          29000  0.010947        $  Cu
          30000  0.000256        $  Zn
          40000  0.000325        $  Zr
$************************************************************

$************************************************************
$  10  : Aluminum, alloy 3003 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.730000 
$  Total atom density (atoms/b-cm) = 6.035E-02 
$  Composition by atom fraction 
M10       13027  0.987924        $  Al-27
          14000  0.003220        $  Si
          25055  0.006198        $  Mn-55
          26000  0.001893        $  Fe
          29000  0.000536        $  Cu
          30000  0.000229        $  Zn
$************************************************************

$************************************************************
$  11  : Aluminum, alloy 4043-O 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.690000 
$  Total atom density (atoms/b-cm) = 5.966E-02 
$  Composition by atom fraction 
M11        4009  0.000015        $  Be-9
          12000  0.000313        $  Mg
          13027  0.944970        $  Al-27
          14000  0.050757        $  Si
          22000  0.000641        $  Ti
          25055  0.000138        $  Mn-55
          26000  0.002203        $  Fe
          29000  0.000726        $  Cu
          30000  0.000237        $  Zn
$************************************************************

$************************************************************
$  12  : Aluminum, alloy 5086-O 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.660000 
$  Total atom density (atoms/b-cm) = 5.928E-02 
$  Composition by atom fraction 
M12       12000  0.044473        $  Mg
          13027  0.947944        $  Al-27
          14000  0.002059        $  Si
          22000  0.000452        $  Ti
          24000  0.000780        $  Cr
          25055  0.002213        $  Mn-55
          26000  0.001297        $  Fe
          29000  0.000230        $  Cu
          30000  0.000554        $  Zn
$************************************************************

$************************************************************
$  13  : Aluminum, alloy 6061-O 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.700000 
$  Total atom density (atoms/b-cm) = 5.993E-02 
$  Composition by atom fraction 
M13       12000  0.011162        $  Mg
          13027  0.977325        $  Al-27
          14000  0.005796        $  Si
          22000  0.000499        $  Ti
          24000  0.001017        $  Cr
          25055  0.000435        $  Mn-55
          26000  0.001987        $  Fe
          29000  0.001174        $  Cu
          30000  0.000606        $  Zn
$************************************************************

$************************************************************
$  14  : Aluminum, alloy 7075-O 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.810000 
$  Total atom density (atoms/b-cm) = 5.999E-02 
$  Composition by atom fraction 
M14       12000  0.029014        $  Mg
          13027  0.933062        $  Al-27
          14000  0.002350        $  Si
          22000  0.000689        $  Ti
          24000  0.001248        $  Cr
          25055  0.000904        $  Mn-55
          26000  0.001480        $  Fe
          29000  0.007102        $  Cu
          30000  0.024150        $  Zn
$************************************************************

$************************************************************
$  15  : Ammonia (liquid at T= -79 C) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = NH3 
$  Molecular weight (g/mole) = 17.03052 
$  Density (g/cm3) = 0.771000 
$  Total atom density (atoms/b-cm) = 1.091E-01 
$  Composition by atom fraction 
M15        1001  0.749992        $  H-1
           7014  0.250008        $  N-14
$************************************************************

$************************************************************
$  16  : Anthracene 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C14H10 
$  Molecular weight (g/mole) = 178.2292 
$  Density (g/cm3) = 1.250000 
$  Total atom density (atoms/b-cm) = 1.014E-01 
$  Composition by atom fraction 
M16        1001  0.416667        $  H-1
           6000  0.583333        $  C
$************************************************************

$************************************************************
$  17  : Argon 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Ar 
$  Molecular weight (g/mole) = 39.948 
$  Density (g/cm3) = 0.001662 
$  Total atom density (atoms/b-cm) = 2.505E-05 
$  Composition by atom fraction 
M17       18000  1.000000        $  Ar
$************************************************************

$************************************************************
$  18  : Asphalt 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.300000 
$  Total atom density (atoms/b-cm) = 1.373E-01 
$  Composition by atom fraction 
M18        1001  0.586755        $  H-1
           6000  0.402588        $  C
           7014  0.002463        $  N-14
           8016  0.001443        $  O-16
          16000  0.006704        $  S
          23000  0.000044        $  V
          28000  0.000003        $  Ni
$************************************************************

$************************************************************
$  19  : Asphalt pavement 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.578400 
$  Total atom density (atoms/b-cm) = 8.943E-02 
$  Composition by atom fraction 
M19        1001  0.134043        $  H-1
           6000  0.110118        $  C
           7014  0.000450        $  N-14
           8016  0.498220        $  O-16
          11023  0.008805        $  Na-23
          12000  0.015543        $  Mg
          13027  0.032824        $  Al-27
          14000  0.143098        $  Si
          16000  0.001519        $  S
          19000  0.007575        $  K
          20000  0.036595        $  Ca
          22000  0.001235        $  Ti
          23000  0.000008        $  V
          25055  0.000115        $  Mn-55
          26000  0.009755        $  Fe
          28000  0.000001        $  Ni
          82000  0.000099        $  Pb
$************************************************************

$************************************************************
$  20  : Bakelite 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.250000 
$  Total atom density (atoms/b-cm) = 9.935E-02 
$  Composition by atom fraction 
M20        1001  0.431814        $  H-1
           6000  0.488641        $  C
           8016  0.079544        $  O-16
$************************************************************

$************************************************************
$  21  : Barium Fluoride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = BaF2 
$  Molecular weight (g/mole) = 175.3238064 
$  Density (g/cm3) = 4.890000 
$  Total atom density (atoms/b-cm) = 5.039E-02 
$  Composition by atom fraction 
M21        9019  0.666662        $  F-19
          56000  0.333338        $  Ba
$************************************************************

$************************************************************
$  22  : Barium sulfate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = BaSO4 
$  Molecular weight (g/mole) = 233.3896 
$  Density (g/cm3) = 4.500000 
$  Total atom density (atoms/b-cm) = 6.967E-02 
$  Composition by atom fraction 
M22        8016  0.666682        $  O-16
          16000  0.166644        $  S
          56000  0.166674        $  Ba
$************************************************************

$************************************************************
$  23  : Benzene 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C6H6 
$  Molecular weight (g/mole) = 78.11184 
$  Density (g/cm3) = 0.876500 
$  Total atom density (atoms/b-cm) = 8.109E-02 
$  Composition by atom fraction 
M23        1001  0.499983        $  H-1
           6000  0.500017        $  C
$************************************************************

$************************************************************
$  24  : Beryllium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Be 
$  Molecular weight (g/mole) = 9.012182 
$  Density (g/cm3) = 1.848000 
$  Total atom density (atoms/b-cm) = 1.235E-01 
$  Composition by atom fraction 
M24        4009  1.000000        $  Be-9
$************************************************************

$************************************************************
$  25  : Beryllium Carbide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Be2C 
$  Molecular weight (g/mole) = 30.035064 
$  Density (g/cm3) = 1.900000 
$  Total atom density (atoms/b-cm) = 1.143E-01 
$  Composition by atom fraction 
M25        4009  0.666667        $  Be-9
           6000  0.333333        $  C
$************************************************************

$************************************************************
$  26  : Beryllium Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = BeO 
$  Molecular weight (g/mole) = 25.011582 
$  Density (g/cm3) = 3.010000 
$  Total atom density (atoms/b-cm) = 1.449E-01 
$  Composition by atom fraction 
M26        4009  0.500000        $  Be-9
           8016  0.500000        $  O-16
$************************************************************

$************************************************************
$  27  : Bismuth 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Bi 
$  Molecular weight (g/mole) = 208.98038 
$  Density (g/cm3) = 9.747000 
$  Total atom density (atoms/b-cm) = 2.809E-02 
$  Composition by atom fraction 
M27       83209  1.000000        $  Bi-209
$************************************************************

$************************************************************
$  28  : Bismuth Germanate (BGO) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Bi4Ge3O12 
$  Molecular weight (g/mole) = 1245.83432 
$  Density (g/cm3) = 7.130000 
$  Total atom density (atoms/b-cm) = 6.548E-02 
$  Composition by atom fraction 
M28        8016  0.631647        $  O-16
          32000  0.157804        $  Ge
          83209  0.210549        $  Bi-209
$************************************************************

$************************************************************
$  29  : Blood (ICRP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.060000 
$  Total atom density (atoms/b-cm) = 1.017E-01 
$  Composition by atom fraction 
M29        1001  0.634604        $  H-1
           6000  0.052291        $  C
           7014  0.013288        $  N-14
           8016  0.298046        $  O-16
          11023  0.000505        $  Na-23
          12000  0.000010        $  Mg
          14000  0.000007        $  Si
          15031  0.000071        $  P-31
          16000  0.000362        $  S
          17000  0.000492        $  Cl
          19000  0.000262        $  K
          20000  0.000009        $  Ca
          26000  0.000052        $  Fe
          30000  0.000001        $  Zn
$************************************************************

$************************************************************
$  30  : Bone Equivalent Plastic, B-100 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.450000 
$  Total atom density (atoms/b-cm) = 1.104E-01 
$  Composition by atom fraction 
M30        1001  0.513809        $  H-1
           6000  0.353630        $  C
           7014  0.012142        $  N-14
           8016  0.015863        $  O-16
           9019  0.069703        $  F-19
          20000  0.034853        $  Ca
$************************************************************

$************************************************************
$  31  : Bone Equivalent Plastic, B-110 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.785000 
$  Total atom density (atoms/b-cm) = 9.798E-02 
$  Composition by atom fraction 
M31        1001  0.386404        $  H-1
           6000  0.335506        $  C
           7014  0.031096        $  N-14
           8016  0.031063        $  O-16
           9019  0.143964        $  F-19
          20000  0.071967        $  Ca
$************************************************************

$************************************************************
$  32  : Bone, Compact (ICRU) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.850000 
$  Total atom density (atoms/b-cm) = 1.340E-01 
$  Composition by atom fraction 
M32        1001  0.527886        $  H-1
           6000  0.192478        $  C
           7014  0.016030        $  N-14
           8016  0.213109        $  O-16
          12000  0.000684        $  Mg
          15031  0.018794        $  P-31
          16000  0.000519        $  S
          20000  0.030501        $  Ca
$************************************************************

$************************************************************
$  33  : Bone, Cortical (ICRP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.850000 
$  Total atom density (atoms/b-cm) = 1.098E-01 
$  Composition by atom fraction 
M33        1001  0.475389        $  H-1
           6000  0.121904        $  C
           7014  0.030412        $  N-14
           8016  0.282848        $  O-16
          12000  0.000918        $  Mg
          15031  0.034380        $  P-31
          16000  0.000997        $  S
          20000  0.053137        $  Ca
          30000  0.000016        $  Zn
$************************************************************

$************************************************************
$  34  : Boral (65% Al-35% B4C) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.530000 
$  Total atom density (atoms/b-cm) = 8.496E-02 
$  Composition by atom fraction 
M34        5000  0.454507        $  B
           6000  0.113475        $  C
          13027  0.432018        $  Al-27
$************************************************************

$************************************************************
$  35  : Boral (Aluminum 10% boron alloy) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.600000 
$  Total atom density (atoms/b-cm) = 6.647E-02 
$  Composition by atom fraction 
M35        5000  0.217879        $  B
          11023  0.005123        $  Na-23
          13027  0.767366        $  Al-27
          14000  0.002097        $  Si
          19000  0.006025        $  K
          22000  0.000246        $  Ti
          26000  0.001265        $  Fe
$************************************************************

$************************************************************
$  36  : Boral (Aluminum 5% boron alloy) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.600000 
$  Total atom density (atoms/b-cm) = 6.213E-02 
$  Composition by atom fraction 
M36        5000  0.116547        $  B
          11023  0.005481        $  Na-23
          13027  0.868116        $  Al-27
          14000  0.001794        $  Si
          19000  0.006445        $  K
          22000  0.000263        $  Ti
          26000  0.001354        $  Fe
$************************************************************

$************************************************************
$  37  : Borax 
$  Source = PNNL-15870 Rev. 1 
$  Formula = NA2B4O7-10(H2O) 
$  Molecular weight (g/mole) = 381.37214 
$  Density (g/cm3) = 1.730000 
$  Total atom density (atoms/b-cm) = 1.175E-01 
$  Composition by atom fraction 
M37        1001  0.465116        $  H-1
           5000  0.093023        $  B
           8016  0.395349        $  O-16
          11023  0.046512        $  Na-23
$************************************************************

$************************************************************
$  38  : Boric Acid 
$  Source = PNNL-15870 Rev. 1 
$  Formula = H3BO3 
$  Molecular weight (g/mole) = 61.83302 
$  Density (g/cm3) = 1.500000 
$  Total atom density (atoms/b-cm) = 1.023E-01 
$  Composition by atom fraction 
M38        1001  0.428571        $  H-1
           5000  0.142857        $  B
           8016  0.428571        $  O-16
$************************************************************

$************************************************************
$  39  : Boron 
$  Source = PNNL-15870 Rev. 1 
$  Formula = B 
$  Molecular weight (g/mole) = 10.811 
$  Density (g/cm3) = 2.370000 
$  Total atom density (atoms/b-cm) = 1.320E-01 
$  Composition by atom fraction 
M39        5000  1.000000        $  B
$************************************************************

$************************************************************
$  40  : Boron Carbide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = B4C 
$  Molecular weight (g/mole) = 55.2547 
$  Density (g/cm3) = 2.520000 
$  Total atom density (atoms/b-cm) = 1.373E-01 
$  Composition by atom fraction 
M40        5000  0.799981        $  B
           6000  0.200019        $  C
$************************************************************

$************************************************************
$  41  : Boron Fluoride (B2F4) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = B2F4 
$  Molecular weight (g/mole) = 97.6156128 
$  Density (g/cm3) = 0.004058 
$  Total atom density (atoms/b-cm) = 1.502E-04 
$  Composition by atom fraction 
M41        5000  0.333333        $  B
           9019  0.666667        $  F-19
$************************************************************

$************************************************************
$  42  : Boron Fluoride (BF3) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = BF3 
$  Molecular weight (g/mole) = 67.8062096 
$  Density (g/cm3) = 0.002831 
$  Total atom density (atoms/b-cm) = 1.006E-04 
$  Composition by atom fraction 
M42        5000  0.250000        $  B
           9019  0.750000        $  F-19
$************************************************************

$************************************************************
$  43  : Boron Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = B2O3 
$  Molecular weight (g/mole) = 69.6202 
$  Density (g/cm3) = 1.812000 
$  Total atom density (atoms/b-cm) = 7.837E-02 
$  Composition by atom fraction 
M43        5000  0.399978        $  B
           8016  0.600022        $  O-16
$************************************************************

$************************************************************
$  44  : Brain (ICRP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.030000 
$  Total atom density (atoms/b-cm) = 1.040E-01 
$  Composition by atom fraction 
M44        1001  0.654712        $  H-1
           6000  0.062268        $  C
           7014  0.005654        $  N-14
           8016  0.274952        $  O-16
          11023  0.000477        $  Na-23
          12000  0.000037        $  Mg
          15031  0.000682        $  P-31
          16000  0.000329        $  S
          17000  0.000397        $  Cl
          19000  0.000473        $  K
          20000  0.000013        $  Ca
          26000  0.000005        $  Fe
          30000  0.000001        $  Zn
$************************************************************

$************************************************************
$  45  : Brass (typical composition) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.070000 
$  Total atom density (atoms/b-cm) = 7.540E-02 
$  Composition by atom fraction 
M45       26000  0.001002        $  Fe
          29000  0.674918        $  Cu
          30000  0.320956        $  Zn
          50000  0.001451        $  Sn
          82000  0.001673        $  Pb
$************************************************************

$************************************************************
$  46  : Brick, Common Silica 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.800000 
$  Total atom density (atoms/b-cm) = 5.361E-02 
$  Composition by atom fraction 
M46        8016  0.663432        $  O-16
          13027  0.003747        $  Al-27
          14000  0.323225        $  Si
          20000  0.007063        $  Ca
          26000  0.002534        $  Fe
$************************************************************

$************************************************************
$  47  : Brick, Fire 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.100000 
$  Total atom density (atoms/b-cm) = 6.174E-02 
$  Composition by atom fraction 
M47        8016  0.636337        $  O-16
          12000  0.005057        $  Mg
          13027  0.160955        $  Al-27
          14000  0.183803        $  Si
          20000  0.003578        $  Ca
          22000  0.005135        $  Ti
          26000  0.005135        $  Fe
$************************************************************

$************************************************************
$  48  : Brick, Kaolin (white) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.100000 
$  Total atom density (atoms/b-cm) = 6.221E-02 
$  Composition by atom fraction 
M48        8016  0.635745        $  O-16
          12000  0.001008        $  Mg
          13027  0.181264        $  Al-27
          14000  0.175771        $  Si
          20000  0.000362        $  Ca
          22000  0.004323        $  Ti
          26000  0.001526        $  Fe
$************************************************************

$************************************************************
$  49  : Bronze (typical composition) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.400000 
$  Total atom density (atoms/b-cm) = 8.152E-02 
$  Composition by atom fraction 
M49       13027  0.065613        $  Al-27
          14000  0.007378        $  Si
          25055  0.004015        $  Mn-55
          26000  0.011344        $  Fe
          28000  0.007103        $  Ni
          29000  0.853667        $  Cu
          30000  0.034190        $  Zn
          50000  0.012809        $  Sn
          82000  0.003881        $  Pb
$************************************************************

$************************************************************
$  50  : C-552 Air-Equivalent Plastic 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.760000 
$  Total atom density (atoms/b-cm) = 9.662E-02 
$  Composition by atom fraction 
M50        1001  0.268599        $  H-1
           6000  0.458133        $  C
           8016  0.003104        $  O-16
           9019  0.268612        $  F-19
          14000  0.001552        $  Si
$************************************************************

$************************************************************
$  51  : Cadmium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Cd 
$  Molecular weight (g/mole) = 112.411 
$  Density (g/cm3) = 8.650000 
$  Total atom density (atoms/b-cm) = 4.634E-02 
$  Composition by atom fraction 
M51       48000  1.000000        $  Cd
$************************************************************

$************************************************************
$  52  : Cadmium Nitrate Tetrahydrate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Cd(NO3)2-4(H2O) 
$  Molecular weight (g/mole) = 308.48192 
$  Density (g/cm3) = 2.450000 
$  Total atom density (atoms/b-cm) = 1.004E-01 
$  Composition by atom fraction 
M52        1001  0.380952        $  H-1
           7014  0.095238        $  N-14
           8016  0.476190        $  O-16
          48000  0.047619        $  Cd
$************************************************************

$************************************************************
$  53  : Cadmium Telluride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CdTe 
$  Molecular weight (g/mole) = 240.011 
$  Density (g/cm3) = 6.200000 
$  Total atom density (atoms/b-cm) = 3.111E-02 
$  Composition by atom fraction 
M53       48000  0.499997        $  Cd
          52000  0.500003        $  Te
$************************************************************

$************************************************************
$  54  : Cadmium Tungstate (CWO) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CdWO4 
$  Molecular weight (g/mole) = 360.2486 
$  Density (g/cm3) = 7.900000 
$  Total atom density (atoms/b-cm) = 7.924E-02 
$  Composition by atom fraction 
M54        8016  0.666662        $  O-16
          48000  0.166664        $  Cd
          74000  0.166674        $  W
$************************************************************

$************************************************************
$  55  : Calcium Carbonate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CaCO3 
$  Molecular weight (g/mole) = 100.0869 
$  Density (g/cm3) = 2.800000 
$  Total atom density (atoms/b-cm) = 8.424E-02 
$  Composition by atom fraction 
M55        6000  0.200002        $  C
           8016  0.599991        $  O-16
          20000  0.200007        $  Ca
$************************************************************

$************************************************************
$  56  : Calcium Fluoride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CaF2 
$  Molecular weight (g/mole) = 78.0748064 
$  Density (g/cm3) = 3.180000 
$  Total atom density (atoms/b-cm) = 7.358E-02 
$  Composition by atom fraction 
M56        9019  0.666655        $  F-19
          20000  0.333345        $  Ca
$************************************************************

$************************************************************
$  57  : Calcium Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CaO 
$  Molecular weight (g/mole) = 56.0774 
$  Density (g/cm3) = 3.300000 
$  Total atom density (atoms/b-cm) = 7.088E-02 
$  Composition by atom fraction 
M57        8016  0.499987        $  O-16
          20000  0.500013        $  Ca
$************************************************************

$************************************************************
$  58  : Calcium Sulfate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CaSO4 
$  Molecular weight (g/mole) = 136.1406 
$  Density (g/cm3) = 2.960000 
$  Total atom density (atoms/b-cm) = 7.856E-02 
$  Composition by atom fraction 
M58        8016  0.666678        $  O-16
          16000  0.166644        $  S
          20000  0.166678        $  Ca
$************************************************************

$************************************************************
$  59  : Carbon Dioxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CO2 
$  Molecular weight (g/mole) = 44.0095 
$  Density (g/cm3) = 0.001842 
$  Total atom density (atoms/b-cm) = 7.562E-05 
$  Composition by atom fraction 
M59        6000  0.333333        $  C
           8016  0.666667        $  O-16
$************************************************************

$************************************************************
$  60  : Carbon Tetrachloride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CCl4 
$  Molecular weight (g/mole) = 153.8227 
$  Density (g/cm3) = 1.594000 
$  Total atom density (atoms/b-cm) = 3.120E-02 
$  Composition by atom fraction 
M60        6000  0.200003        $  C
          17000  0.799997        $  Cl
$************************************************************

$************************************************************
$  61  : Carbon, Activated 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C 
$  Density (g/cm3) = 0.320000 
$  Total atom density (atoms/b-cm) = 1.604E-02 
$  Composition by atom fraction 
M61        5000  0.000001        $  B
           6000  0.999999        $  C
$************************************************************

$************************************************************
$  62  : Carbon, Amorphous 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C 
$  Density (g/cm3) = 2.000000 
$  Total atom density (atoms/b-cm) = 1.003E-01 
$  Composition by atom fraction 
M62        5000  0.000001        $  B
           6000  0.999999        $  C
$************************************************************

$************************************************************
$  63  : Carbon, Graphite (reactor grade) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C 
$  Density (g/cm3) = 1.700000 
$  Total atom density (atoms/b-cm) = 8.524E-02 
$  Composition by atom fraction 
M63        5000  0.000001        $  B
           6000  0.999999        $  C
$************************************************************

$************************************************************
$  64  : Cat litter (clumping) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Na0.2Ca0.1Al2Si4O10(OH)2(H2O)10 
$  Density (g/cm3) = 1.100000 
$  Total atom density (atoms/b-cm) = 6.070E-02 
$  Composition by atom fraction 
M64        1001  0.437442        $  H-1
           8016  0.437316        $  O-16
          11023  0.003988        $  Na-23
          13027  0.039761        $  Al-27
          14000  0.079505        $  Si
          20000  0.001988        $  Ca
$************************************************************

$************************************************************
$  65  : Cat litter (non-clumping) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.100000 
$  Total atom density (atoms/b-cm) = 4.231E-02 
$  Composition by atom fraction 
M65        1001  0.213314        $  H-1
           8016  0.528366        $  O-16
          11023  0.029469        $  Na-23
          12000  0.032510        $  Mg
          13027  0.030252        $  Al-27
          14000  0.163444        $  Si
          19000  0.001508        $  K
          20000  0.000524        $  Ca
          26000  0.000613        $  Fe
$************************************************************

$************************************************************
$  66  : Cellulose Acetate 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.420000 
$  Total atom density (atoms/b-cm) = 1.108E-01 
$  Composition by atom fraction 
M66        1001  0.476179        $  H-1
           6000  0.285724        $  C
           8016  0.238097        $  O-16
$************************************************************

$************************************************************
$  67  : Celotex 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C6H10O5 
$  Molecular weight (g/mole) = 162.1406 
$  Density (g/cm3) = 0.240000 
$  Total atom density (atoms/b-cm) = 1.872E-02 
$  Composition by atom fraction 
M67        1001  0.476190        $  H-1
           6000  0.285714        $  C
           8016  0.238095        $  O-16
$************************************************************

$************************************************************
$  68  : Ceric Sulfate Dosimeter Solution 
$  Source = PNNL-15870 Rev. 1 
$  Formula = H2O:Ce2SO4 
$  Density (g/cm3) = 1.030000 
$  Total atom density (atoms/b-cm) = 1.005E-01 
$  Composition by atom fraction 
M68        1001  0.659087        $  H-1
           7014  0.000353        $  N-14
           8016  0.337656        $  O-16
          16000  0.002816        $  S
          58000  0.000088        $  Ce
$************************************************************

$************************************************************
$  69  : Cerium Fluoride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CeF3 
$  Molecular weight (g/mole) = 197.1112096 
$  Density (g/cm3) = 6.160000 
$  Total atom density (atoms/b-cm) = 7.528E-02 
$  Composition by atom fraction 
M69        9019  0.750000        $  F-19
          58000  0.250000        $  Ce
$************************************************************

$************************************************************
$  70  : Cesium Iodide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CsI 
$  Molecular weight (g/mole) = 259.80992 
$  Density (g/cm3) = 4.510000 
$  Total atom density (atoms/b-cm) = 2.091E-02 
$  Composition by atom fraction 
M70       53127  0.500000        $  I-127
          55133  0.500000        $  Cs-133
$************************************************************

$************************************************************
$  71  : Chromium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Cr 
$  Molecular weight (g/mole) = 51.9961 
$  Density (g/cm3) = 7.180000 
$  Total atom density (atoms/b-cm) = 8.316E-02 
$  Composition by atom fraction 
M71       24000  1.000000        $  Cr
$************************************************************

$************************************************************
$  72  : Clay 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.200000 
$  Total atom density (atoms/b-cm) = 6.333E-02 
$  Composition by atom fraction 
M72        8016  0.633300        $  O-16
          11023  0.006923        $  Na-23
          12000  0.009202        $  Mg
          13027  0.094689        $  Al-27
          14000  0.219134        $  Si
          15031  0.000076        $  P-31
          19000  0.010930        $  K
          20000  0.009895        $  Ca
          22000  0.002040        $  Ti
          25055  0.000024        $  Mn-55
          26000  0.013787        $  Fe
$************************************************************

$************************************************************
$  73  : Coal, Anthracite 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.840000 
$  Total atom density (atoms/b-cm) = 5.269E-02 
$  Composition by atom fraction 
M73        1001  0.228612        $  H-1
           6000  0.749020        $  C
           7014  0.006169        $  N-14
           8016  0.014402        $  O-16
          16000  0.001797        $  S
$************************************************************

$************************************************************
$  74  : Coal, Bituminous 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.750000 
$  Total atom density (atoms/b-cm) = 5.954E-02 
$  Composition by atom fraction 
M74        1001  0.421425        $  H-1
           6000  0.533649        $  C
           7014  0.008665        $  N-14
           8016  0.033186        $  O-16
          16000  0.003075        $  S
$************************************************************

$************************************************************
$  75  : Coal, Lignite 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.750000 
$  Total atom density (atoms/b-cm) = 5.264E-02 
$  Composition by atom fraction 
M75        1001  0.357505        $  H-1
           6000  0.519319        $  C
           7014  0.007350        $  N-14
           8016  0.114220        $  O-16
          16000  0.001605        $  S
$************************************************************

$************************************************************
$  76  : Concrete, Barite (Type BA) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 3.350000 
$  Total atom density (atoms/b-cm) = 6.547E-02 
$  Composition by atom fraction 
M76        1001  0.109602        $  H-1
           8016  0.600189        $  O-16
          12000  0.001515        $  Mg
          13027  0.004777        $  Al-27
          14000  0.011473        $  Si
          16000  0.103654        $  S
          20000  0.038593        $  Ca
          26000  0.026213        $  Fe
          56000  0.103983        $  Ba
$************************************************************

$************************************************************
$  77  : Concrete, Barytes-Limonite 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 3.360000 
$  Total atom density (atoms/b-cm) = 8.732E-02 
$  Composition by atom fraction 
M77        1001  0.235416        $  H-1
           8016  0.548162        $  O-16
          11023  0.000911        $  Na-23
          12000  0.002201        $  Mg
          13027  0.004311        $  Al-27
          14000  0.011182        $  Si
          16000  0.054993        $  S
          20000  0.031170        $  Ca
          25055  0.000593        $  Mn-55
          26000  0.056903        $  Fe
          56000  0.054157        $  Ba
$************************************************************

$************************************************************
$  78  : Concrete, Boron Frits-baryte 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 3.100000 
$  Total atom density (atoms/b-cm) = 7.064E-02 
$  Composition by atom fraction 
M78        1001  0.147522        $  H-1
           5000  0.025543        $  B
           8016  0.560939        $  O-16
           9019  0.003215        $  F-19
          11023  0.013975        $  Na-23
          12000  0.002513        $  Mg
          13027  0.006298        $  Al-27
          14000  0.031293        $  Si
          16000  0.075769        $  S
          19000  0.000679        $  K
          20000  0.041474        $  Ca
          25055  0.000097        $  Mn-55
          26000  0.010413        $  Fe
          30000  0.002679        $  Zn
          56000  0.077592        $  Ba
$************************************************************

$************************************************************
$  79  : Concrete, Colemanite-baryte 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 3.200000 
$  Total atom density (atoms/b-cm) = 7.845E-02 
$  Composition by atom fraction 
M79        1001  0.208729        $  H-1
           5000  0.022437        $  B
           8016  0.539754        $  O-16
          11023  0.001184        $  Na-23
          12000  0.002240        $  Mg
          13027  0.005596        $  Al-27
          14000  0.015511        $  Si
          16000  0.074335        $  S
          20000  0.052247        $  Ca
          25055  0.000045        $  Mn-55
          26000  0.004565        $  Fe
          56000  0.073356        $  Ba
$************************************************************

$************************************************************
$  80  : Concrete, Ferro-phosphorus 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 4.800000 
$  Total atom density (atoms/b-cm) = 9.039E-02 
$  Composition by atom fraction 
M80        1001  0.158643        $  H-1
           8016  0.207881        $  O-16
          12000  0.002632        $  Mg
          13027  0.004741        $  Al-27
          14000  0.038715        $  Si
          15031  0.203403        $  P-31
          20000  0.033514        $  Ca
          26000  0.350471        $  Fe
$************************************************************

$************************************************************
$  81  : Concrete, Hanford Dry 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.180000 
$  Total atom density (atoms/b-cm) = 6.642E-02 
$  Composition by atom fraction 
M81        1001  0.078440        $  H-1
           8016  0.595591        $  O-16
          11023  0.001864        $  Na-23
          12000  0.011462        $  Mg
          13027  0.050831        $  Al-27
          14000  0.195330        $  Si
          19000  0.006577        $  K
          20000  0.039567        $  Ca
          26000  0.020338        $  Fe
$************************************************************

$************************************************************
$  82  : Concrete, Hanford Wet 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.350000 
$  Total atom density (atoms/b-cm) = 8.423E-02 
$  Composition by atom fraction 
M82        1001  0.205170        $  H-1
           8016  0.539084        $  O-16
          11023  0.001463        $  Na-23
          12000  0.008993        $  Mg
          13027  0.039880        $  Al-27
          14000  0.153250        $  Si
          19000  0.005160        $  K
          20000  0.031043        $  Ca
          26000  0.015956        $  Fe
$************************************************************

$************************************************************
$  83  : Concrete, Iron-limonite 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 4.400000 
$  Total atom density (atoms/b-cm) = 7.222E-02 
$  Composition by atom fraction 
M83        1001  0.018192        $  H-1
           8016  0.412591        $  O-16
          12000  0.003018        $  Mg
          13027  0.006796        $  Al-27
          14000  0.018281        $  Si
          16000  0.001144        $  S
          20000  0.055818        $  Ca
          25055  0.010681        $  Mn-55
          26000  0.473480        $  Fe
$************************************************************

$************************************************************
$  84  : Concrete, Iron-Portland 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 5.900000 
$  Total atom density (atoms/b-cm) = 8.633E-02 
$  Composition by atom fraction 
M84        1001  0.135585        $  H-1
           8016  0.150644        $  O-16
          12000  0.002215        $  Mg
          13027  0.005065        $  Al-27
          14000  0.013418        $  Si
          16000  0.000646        $  S
          20000  0.040919        $  Ca
          25055  0.002638        $  Mn-55
          26000  0.648869        $  Fe
$************************************************************

$************************************************************
$  85  : Concrete, Limonite and steel 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 4.540000 
$  Total atom density (atoms/b-cm) = 8.851E-02 
$  Composition by atom fraction 
M85        1001  0.209640        $  H-1
           8016  0.301631        $  O-16
          12000  0.001963        $  Mg
          13027  0.007326        $  Al-27
          14000  0.016261        $  Si
          19000  0.000697        $  K
          20000  0.044390        $  Ca
          23000  0.000535        $  V
          26000  0.417557        $  Fe
$************************************************************

$************************************************************
$  86  : Concrete, Los Alamos (MCNP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.250000 
$  Total atom density (atoms/b-cm) = 7.186E-02 
$  Composition by atom fraction 
M86        1001  0.084739        $  H-1
           8016  0.604079        $  O-16
          11023  0.012523        $  Na-23
          13027  0.024842        $  Al-27
          14000  0.241921        $  Si
          20000  0.027244        $  Ca
          26000  0.004652        $  Fe
$************************************************************

$************************************************************
$  87  : Concrete, Luminite-colemanite-baryte 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 3.100000 
$  Total atom density (atoms/b-cm) = 8.194E-02 
$  Composition by atom fraction 
M87        1001  0.247678        $  H-1
           5000  0.018643        $  B
           8016  0.528939        $  O-16
          11023  0.001096        $  Na-23
          12000  0.001319        $  Mg
          13027  0.014940        $  Al-27
          14000  0.007829        $  Si
          16000  0.064713        $  S
          20000  0.031316        $  Ca
          22000  0.006077        $  Ti
          25055  0.000500        $  Mn-55
          26000  0.012591        $  Fe
          56000  0.064360        $  Ba
$************************************************************

$************************************************************
$  88  : Concrete, Luminite-Portland-colemanite-baryte 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 3.100000 
$  Total atom density (atoms/b-cm) = 8.300E-02 
$  Composition by atom fraction 
M88        1001  0.248270        $  H-1
           5000  0.021464        $  B
           8016  0.525811        $  O-16
          11023  0.001088        $  Na-23
          12000  0.001872        $  Mg
          13027  0.011129        $  Al-27
          14000  0.012069        $  Si
          16000  0.063640        $  S
          20000  0.043537        $  Ca
          22000  0.000337        $  Ti
          25055  0.000166        $  Mn-55
          26000  0.007618        $  Fe
          56000  0.062999        $  Ba
$************************************************************

$************************************************************
$  89  : Concrete, M-1 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 4.500000 
$  Total atom density (atoms/b-cm) = 8.790E-02 
$  Composition by atom fraction 
M89        1001  0.244686        $  H-1
           5000  0.025664        $  B
           8016  0.206174        $  O-16
          12000  0.054542        $  Mg
          17000  0.018261        $  Cl
          25055  0.001683        $  Mn-55
          20000  0.008461        $  Ca
          26000  0.440528        $  Fe
$************************************************************

$************************************************************
$  90  : Concrete, Magnetite 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 3.530000 
$  Total atom density (atoms/b-cm) = 7.970E-02 
$  Composition by atom fraction 
M90        1001  0.082371        $  H-1
           8016  0.551004        $  O-16
          12000  0.010248        $  Mg
          13027  0.023218        $  Al-27
          14000  0.024455        $  Si
          16000  0.001177        $  S
          20000  0.047270        $  Ca
          22000  0.030275        $  Ti
          23000  0.001630        $  V
          24000  0.000871        $  Cr
          25055  0.000962        $  Mn-55
          26000  0.226519        $  Fe
$************************************************************

$************************************************************
$  91  : Concrete, Magnetite and steel 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 4.640000 
$  Total atom density (atoms/b-cm) = 7.646E-02 
$  Composition by atom fraction 
M91        1001  0.086069        $  H-1
           8016  0.314488        $  O-16
          12000  0.005516        $  Mg
          13027  0.014030        $  Al-27
          14000  0.020499        $  Si
          20000  0.050769        $  Ca
          22000  0.012192        $  Ti
          23000  0.000464        $  V
          26000  0.495972        $  Fe
$************************************************************

$************************************************************
$  92  : Concrete, Magnuson 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.147000 
$  Total atom density (atoms/b-cm) = 7.128E-02 
$  Composition by atom fraction 
M92        1001  0.059733        $  H-1
           6000  0.159071        $  C
           8016  0.566258        $  O-16
          11023  0.001113        $  Na-23
          12000  0.070307        $  Mg
          13027  0.005284        $  Al-27
          14000  0.027193        $  Si
          16000  0.001405        $  S
          17000  0.000268        $  Cl
          19000  0.004382        $  K
          20000  0.102437        $  Ca
          22000  0.000564        $  Ti
          25055  0.000169        $  Mn-55
          26000  0.001817        $  Fe
$************************************************************

$************************************************************
$  93  : Concrete, MO 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 5.500000 
$  Total atom density (atoms/b-cm) = 8.760E-02 
$  Composition by atom fraction 
M93        1001  0.187558        $  H-1
           8016  0.141791        $  O-16
          12000  0.057558        $  Mg
          25055  0.002753        $  Mn-55
          17000  0.013864        $  Cl
          26000  0.596476        $  Fe
$************************************************************

$************************************************************
$  94  : Concrete, Oak Ridge (ORNL) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.300000 
$  Total atom density (atoms/b-cm) = 7.969E-02 
$  Composition by atom fraction 
M94        1001  0.106691        $  H-1
           6000  0.253540        $  C
           8016  0.445629        $  O-16
          11023  0.000205        $  Na-23
          12000  0.023349        $  Mg
          13027  0.006977        $  Al-27
          14000  0.021339        $  Si
          19000  0.000506        $  K
          20000  0.139343        $  Ca
          26000  0.002423        $  Fe
$************************************************************

$************************************************************
$  95  : Concrete, Ordinary (NBS 03) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.350000 
$  Total atom density (atoms/b-cm) = 7.950E-02 
$  Composition by atom fraction 
M95        1001  0.149867        $  H-1
           6000  0.074204        $  C
           8016  0.526832        $  O-16
          12000  0.017713        $  Mg
          13027  0.023794        $  Al-27
          14000  0.091972        $  Si
          16000  0.001649        $  S
          19000  0.000773        $  K
          20000  0.109680        $  Ca
          26000  0.003516        $  Fe
$************************************************************

$************************************************************
$  96  : Concrete, Ordinary (NBS 04) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.350000 
$  Total atom density (atoms/b-cm) = 7.533E-02 
$  Composition by atom fraction 
M96        1001  0.103586        $  H-1
           8016  0.584810        $  O-16
          11023  0.013974        $  Na-23
          12000  0.001983        $  Mg
          13027  0.031850        $  Al-27
          14000  0.210755        $  Si
          16000  0.000751        $  S
          19000  0.009244        $  K
          20000  0.038877        $  Ca
          26000  0.004171        $  Fe
$************************************************************

$************************************************************
$  97  : Concrete, Ordinary (NIST) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.300000 
$  Total atom density (atoms/b-cm) = 9.946E-02 
$  Composition by atom fraction 
M97        1001  0.305330        $  H-1
           6000  0.002880        $  C
           8016  0.500407        $  O-16
          11023  0.009212        $  Na-23
          12000  0.000725        $  Mg
          13027  0.010298        $  Al-27
          14000  0.151042        $  Si
          19000  0.003578        $  K
          20000  0.014924        $  Ca
          26000  0.001605        $  Fe
$************************************************************

$************************************************************
$  98  : Concrete, Portland 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.300000 
$  Total atom density (atoms/b-cm) = 8.143E-02 
$  Composition by atom fraction 
M98        1001  0.168759        $  H-1
           6000  0.001416        $  C
           8016  0.562524        $  O-16
          11023  0.011838        $  Na-23
          12000  0.001400        $  Mg
          13027  0.021354        $  Al-27
          14000  0.204115        $  Si
          19000  0.005656        $  K
          20000  0.018674        $  Ca
          26000  0.004264        $  Fe
$************************************************************

$************************************************************
$  99  : Concrete, Regular 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.300000 
$  Total atom density (atoms/b-cm) = 8.178E-02 
$  Composition by atom fraction 
M99        1001  0.168038        $  H-1
           8016  0.563183        $  O-16
          11023  0.021365        $  Na-23
          13027  0.021343        $  Al-27
          14000  0.203231        $  Si
          20000  0.018595        $  Ca
          26000  0.004246        $  Fe
$************************************************************

$************************************************************
$  100 : Concrete, Rocky Flats 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.320000 
$  Total atom density (atoms/b-cm) = 7.799E-02 
$  Composition by atom fraction 
M100       1001  0.133302        $  H-1
           6000  0.082334        $  C
           7014  0.000256        $  N-14
           8016  0.542947        $  O-16
          11023  0.004909        $  Na-23
          12000  0.009213        $  Mg
          13027  0.014408        $  Al-27
          14000  0.098869        $  Si
          16000  0.001062        $  S
          19000  0.006277        $  K
          20000  0.102809        $  Ca
          22000  0.000374        $  Ti
          26000  0.003240        $  Fe
$************************************************************

$************************************************************
$  101 : Concrete, Serpentine 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.100000 
$  Total atom density (atoms/b-cm) = 8.108E-02 
$  Composition by atom fraction 
M101       1001  0.246195        $  H-1
           6000  0.001181        $  C
           8016  0.498977        $  O-16
          11023  0.002776        $  Na-23
          12000  0.086638        $  Mg
          13027  0.011036        $  Al-27
          14000  0.116124        $  Si
          19000  0.001632        $  K
          20000  0.026536        $  Ca
          24000  0.000273        $  Cr
          26000  0.008633        $  Fe
$************************************************************

$************************************************************
$  102 : Copper 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Cu 
$  Molecular weight (g/mole) = 63.546 
$  Density (g/cm3) = 8.960000 
$  Total atom density (atoms/b-cm) = 8.491E-02 
$  Composition by atom fraction 
M102      29000  1.000000        $  Cu
$************************************************************

$************************************************************
$  103 : Diatomaceous Earth 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.220000 
$  Total atom density (atoms/b-cm) = 7.780E-03 
$  Composition by atom fraction 
M103       1001  0.151312        $  H-1
           8016  0.581761        $  O-16
          11023  0.007330        $  Na-23
          12000  0.001943        $  Mg
          13027  0.009834        $  Al-27
          14000  0.239358        $  Si
          19000  0.004823        $  K
          20000  0.001676        $  Ca
          26000  0.001962        $  Fe
$************************************************************

$************************************************************
$  104 : Earth, Typical Western U.S. 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.520000 
$  Total atom density (atoms/b-cm) = 6.831E-02 
$  Composition by atom fraction 
M104       1001  0.316855        $  H-1
           8016  0.501581        $  O-16
          13027  0.039951        $  Al-27
          14000  0.141613        $  Si
$************************************************************

$************************************************************
$  105 : Earth, U.S. Average 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.520000 
$  Total atom density (atoms/b-cm) = 4.383E-02 
$  Composition by atom fraction 
M105       8016  0.670604        $  O-16
          11023  0.005578        $  Na-23
          12000  0.011432        $  Mg
          13027  0.053073        $  Al-27
          14000  0.201665        $  Si
          19000  0.007653        $  K
          20000  0.026664        $  Ca
          22000  0.002009        $  Ti
          25055  0.000272        $  Mn-55
          26000  0.021050        $  Fe
$************************************************************

$************************************************************
$  106 : Ethane 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2H6 
$  Molecular weight (g/mole) = 30.06904 
$  Density (g/cm3) = 0.001253 
$  Total atom density (atoms/b-cm) = 2.008E-04 
$  Composition by atom fraction 
M106       1001  0.750000        $  H-1
           6000  0.250000        $  C
$************************************************************

$************************************************************
$  107 : Ethyl Acetate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C4H8O2 
$  Molecular weight (g/mole) = 88.10512 
$  Density (g/cm3) = 0.901000 
$  Total atom density (atoms/b-cm) = 8.622E-02 
$  Composition by atom fraction 
M107       1001  0.571429        $  H-1
           6000  0.285714        $  C
           8016  0.142857        $  O-16
$************************************************************

$************************************************************
$  108 : Ethyl Alcohol 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2H6O 
$  Molecular weight (g/mole) = 46.06844 
$  Density (g/cm3) = 0.789300 
$  Total atom density (atoms/b-cm) = 9.286E-02 
$  Composition by atom fraction 
M108       1001  0.666654        $  H-1
           6000  0.222232        $  C
           8016  0.111113        $  O-16
$************************************************************

$************************************************************
$  109 : Ethylene 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2H4 
$  Molecular weight (g/mole) = 28.05316 
$  Density (g/cm3) = 0.001175 
$  Total atom density (atoms/b-cm) = 1.513E-04 
$  Composition by atom fraction 
M109       1001  0.666653        $  H-1
           6000  0.333347        $  C
$************************************************************

$************************************************************
$  110 : Ethylene Glycol 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2H6O2 
$  Molecular weight (g/mole) = 62.06784 
$  Density (g/cm3) = 1.114000 
$  Total atom density (atoms/b-cm) = 1.081E-01 
$  Composition by atom fraction 
M110       1001  0.600000        $  H-1
           6000  0.200000        $  C
           8016  0.200000        $  O-16
$************************************************************

$************************************************************
$  111 : Explosive compound, AN 
$  Source = PNNL-15870 Rev. 1 
$  Formula = NH4NO3 
$  Molecular weight (g/mole) = 80.04336 
$  Density (g/cm3) = 1.720000 
$  Total atom density (atoms/b-cm) = 1.165E-01 
$  Composition by atom fraction 
M111       1001  0.444444        $  H-1
           7014  0.222222        $  N-14
           8016  0.333333        $  O-16
$************************************************************

$************************************************************
$  112 : Explosive compound, EGDN 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2H4N2O6 
$  Molecular weight (g/mole) = 152.06296 
$  Density (g/cm3) = 1.490000 
$  Total atom density (atoms/b-cm) = 8.261E-02 
$  Composition by atom fraction 
M112       1001  0.285714        $  H-1
           6000  0.142857        $  C
           7014  0.142857        $  N-14
           8016  0.428571        $  O-16
$************************************************************

$************************************************************
$  113 : Explosive compound, HMX 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C4H8N8O8 
$  Molecular weight (g/mole) = 296.15512 
$  Density (g/cm3) = 1.890000 
$  Total atom density (atoms/b-cm) = 1.076E-01 
$  Composition by atom fraction 
M113       1001  0.285714        $  H-1
           6000  0.142857        $  C
           7014  0.285714        $  N-14
           8016  0.285714        $  O-16
$************************************************************

$************************************************************
$  114 : Explosive compound, NC 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.490000 
$  Total atom density (atoms/b-cm) = 8.647E-02 
$  Composition by atom fraction 
M114       1001  0.300771        $  H-1
           6000  0.234383        $  C
           7014  0.089844        $  N-14
           8016  0.375002        $  O-16
$************************************************************

$************************************************************
$  115 : Explosive compound, NG 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C3H5N3O9 
$  Molecular weight (g/mole) = 227.0865 
$  Density (g/cm3) = 1.600000 
$  Total atom density (atoms/b-cm) = 8.486E-02 
$  Composition by atom fraction 
M115       1001  0.250000        $  H-1
           6000  0.150000        $  C
           7014  0.150000        $  N-14
           8016  0.450000        $  O-16
$************************************************************

$************************************************************
$  116 : Explosive compound, PETN 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C5H8N4O12 
$  Molecular weight (g/mole) = 316.13662 
$  Density (g/cm3) = 1.770000 
$  Total atom density (atoms/b-cm) = 9.778E-02 
$  Composition by atom fraction 
M116       1001  0.275862        $  H-1
           6000  0.172414        $  C
           7014  0.137931        $  N-14
           8016  0.413793        $  O-16
$************************************************************

$************************************************************
$  117 : Explosive compound, RDX 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C3H6N6O6 
$  Molecular weight (g/mole) = 222.11634 
$  Density (g/cm3) = 1.820000 
$  Total atom density (atoms/b-cm) = 1.036E-01 
$  Composition by atom fraction 
M117       1001  0.285714        $  H-1
           6000  0.142857        $  C
           7014  0.285714        $  N-14
           8016  0.285714        $  O-16
$************************************************************

$************************************************************
$  118 : Explosive compound, TNT 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C6H2(NO2)3CH3 
$  Molecular weight (g/mole) = 227.1311 
$  Density (g/cm3) = 1.650000 
$  Total atom density (atoms/b-cm) = 9.187E-02 
$  Composition by atom fraction 
M118       1001  0.238095        $  H-1
           6000  0.333333        $  C
           7014  0.142857        $  N-14
           8016  0.285714        $  O-16
$************************************************************

$************************************************************
$  119 : Eye Lens (ICRP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.100000 
$  Total atom density (atoms/b-cm) = 1.055E-01 
$  Composition by atom fraction 
M119       1001  0.618329        $  H-1
           6000  0.101257        $  C
           7014  0.023877        $  N-14
           8016  0.256537        $  O-16
$************************************************************

$************************************************************
$  120 : Felt 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.185000 
$  Total atom density (atoms/b-cm) = 1.272E-02 
$  Composition by atom fraction 
M120       1001  0.384052        $  H-1
           6000  0.316901        $  C
           7014  0.110360        $  N-14
           8016  0.188686        $  O-16
$************************************************************

$************************************************************
$  121 : Ferric Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Fe2O3 
$  Molecular weight (g/mole) = 159.6882 
$  Density (g/cm3) = 5.200000 
$  Total atom density (atoms/b-cm) = 9.805E-02 
$  Composition by atom fraction 
M121       8016  0.599991        $  O-16
          26000  0.400009        $  Fe
$************************************************************

$************************************************************
$  122 : Ferrous Sulfate Dosimeter Solution 
$  Source = PNNL-15870 Rev. 1 
$  Formula = H2O:FeSO4 
$  Density (g/cm3) = 1.024000 
$  Total atom density (atoms/b-cm) = 1.004E-01 
$  Composition by atom fraction 
M122       1001  0.660018        $  H-1
           7014  0.000012        $  N-14
           8016  0.337467        $  O-16
          11023  0.000006        $  Na-23
          16000  0.002485        $  S
          17000  0.000006        $  Cl
          26000  0.000006        $  Fe
$************************************************************

$************************************************************
$  123 : Fertilizer (Muriate of Potash) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.270000 
$  Total atom density (atoms/b-cm) = 2.070E-02 
$  Composition by atom fraction 
M123       1001  0.001849        $  H-1
           8016  0.001658        $  O-16
          11023  0.013643        $  Na-23
          12000  0.000313        $  Mg
          16000  0.000183        $  S
          17000  0.498162        $  Cl
          19000  0.483786        $  K
          20000  0.000254        $  Ca
          35000  0.000153        $  Br
$************************************************************

$************************************************************
$  124 : Fiberglass, Type C 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.490000 
$  Total atom density (atoms/b-cm) = 7.354E-02 
$  Composition by atom fraction 
M124       5000  0.035039        $  B
           8016  0.609968        $  O-16
          11023  0.052479        $  Na-23
          12000  0.015131        $  Mg
          13027  0.015950        $  Al-27
          14000  0.219918        $  Si
          16000  0.000254        $  S
          20000  0.050751        $  Ca
          26000  0.000509        $  Fe
$************************************************************

$************************************************************
$  125 : Fiberglass, Type E 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.565000 
$  Total atom density (atoms/b-cm) = 7.446E-02 
$  Composition by atom fraction 
M125       5000  0.043757        $  B
           8016  0.611965        $  O-16
           9019  0.005345        $  F-19
          11023  0.006554        $  Na-23
          12000  0.012597        $  Mg
          13027  0.055772        $  Al-27
          14000  0.182528        $  Si
          19000  0.004312        $  K
          20000  0.074244        $  Ca
          22000  0.001907        $  Ti
          26000  0.001017        $  Fe
$************************************************************

$************************************************************
$  126 : Fiberglass, Type R 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.550000 
$  Total atom density (atoms/b-cm) = 7.433E-02 
$  Composition by atom fraction 
M126       8016  0.628478        $  O-16
          12000  0.030755        $  Mg
          13027  0.101309        $  Al-27
          14000  0.206302        $  Si
          20000  0.033156        $  Ca
$************************************************************

$************************************************************
$  127 : Freon-12 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.120000 
$  Total atom density (atoms/b-cm) = 2.789E-02 
$  Composition by atom fraction 
M127       6000  0.200004        $  C
           9019  0.399998        $  F-19
          17000  0.399998        $  Cl
$************************************************************

$************************************************************
$  128 : Freon-12B2 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.800000 
$  Total atom density (atoms/b-cm) = 2.583E-02 
$  Composition by atom fraction 
M128       6000  0.200003        $  C
           9019  0.399999        $  F-19
          35000  0.399999        $  Br
$************************************************************

$************************************************************
$  129 : Freon-13 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.950000 
$  Total atom density (atoms/b-cm) = 2.738E-02 
$  Composition by atom fraction 
M129       6000  0.200004        $  C
           9019  0.599997        $  F-19
          17000  0.199999        $  Cl
$************************************************************

$************************************************************
$  130 : Freon-13B1 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.500000 
$  Total atom density (atoms/b-cm) = 3.033E-02 
$  Composition by atom fraction 
M130       6000  0.200003        $  C
           9019  0.599998        $  F-19
          35000  0.199999        $  Br
$************************************************************

$************************************************************
$  131 : Freon-13I1 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.800000 
$  Total atom density (atoms/b-cm) = 2.767E-02 
$  Composition by atom fraction 
M131       6000  0.200005        $  C
           9019  0.599996        $  F-19
          53127  0.199999        $  I-127
$************************************************************

$************************************************************
$  132 : Gadolinium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Gd 
$  Molecular weight (g/mole) = 157.25 
$  Density (g/cm3) = 7.900400 
$  Total atom density (atoms/b-cm) = 3.026E-02 
$  Composition by atom fraction 
M132      64000  1.000000        $  Gd
$************************************************************

$************************************************************
$  133 : Gadolinium Oxysulfide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Gd2O2S 
$  Molecular weight (g/mole) = 378.5638 
$  Density (g/cm3) = 7.440000 
$  Total atom density (atoms/b-cm) = 5.918E-02 
$  Composition by atom fraction 
M133       8016  0.400012        $  O-16
          16000  0.199976        $  S
          64000  0.400012        $  Gd
$************************************************************

$************************************************************
$  134 : Gadolinium Silicate (GSO) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Gd2SiO5 
$  Molecular weight (g/mole) = 422.5825 
$  Density (g/cm3) = 6.710000 
$  Total atom density (atoms/b-cm) = 7.650E-02 
$  Composition by atom fraction 
M134       8016  0.625000        $  O-16
          14000  0.125000        $  Si
          64000  0.250000        $  Gd
$************************************************************

$************************************************************
$  135 : Gafchromic Sensor (GS) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.300000 
$  Total atom density (atoms/b-cm) = 1.248E-01 
$  Composition by atom fraction 
M135       1001  0.558087        $  H-1
           6000  0.316304        $  C
           7014  0.050234        $  N-14
           8016  0.075374        $  O-16
$************************************************************

$************************************************************
$  136 : Gallium Arsenide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = GaAs 
$  Molecular weight (g/mole) = 144.6446 
$  Density (g/cm3) = 5.310000 
$  Total atom density (atoms/b-cm) = 4.422E-02 
$  Composition by atom fraction 
M136      31000  0.500000        $  Ga
          33075  0.500000        $  As-75
$************************************************************

$************************************************************
$  137 : Gasoline 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C8H18 
$  Molecular weight (g/mole) = 114.22852 
$  Density (g/cm3) = 0.721000 
$  Total atom density (atoms/b-cm) = 9.811E-02 
$  Composition by atom fraction 
M137       1001  0.689368        $  H-1
           6000  0.310632        $  C
$************************************************************

$************************************************************
$  138 : Germanium, High Purity 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Ge 
$  Molecular weight (g/mole) = 72.64 
$  Density (g/cm3) = 5.323000 
$  Total atom density (atoms/b-cm) = 4.413E-02 
$  Composition by atom fraction 
M138      32000  1.000000        $  Ge
$************************************************************

$************************************************************
$  139 : Glass Scintillator, Li Doped  (GS1, GS2, GS3) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.660000 
$  Total atom density (atoms/b-cm) = 8.233E-02 
$  Composition by atom fraction 
M139       3000  0.078133        $  Li
           8016  0.581195        $  O-16
          12000  0.115854        $  Mg
          13027  0.041980        $  Al-27
          14000  0.178096        $  Si
          58000  0.004742        $  Ce
$************************************************************

$************************************************************
$  140 : Glass Scintillator, Li Doped  (GS10, GS20, GS30) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.500000 
$  Total atom density (atoms/b-cm) = 8.650E-02 
$  Composition by atom fraction 
M140       3000  0.209694        $  Li
           8016  0.545112        $  O-16
          12000  0.017274        $  Mg
          13027  0.061454        $  Al-27
          14000  0.162223        $  Si
          58000  0.004242        $  Ce
$************************************************************

$************************************************************
$  141 : Glass Scintillator, Li Doped  (GSF1) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.420000 
$  Total atom density (atoms/b-cm) = 7.863E-02 
$  Composition by atom fraction 
M141       3000  0.124299        $  Li
           8016  0.585945        $  O-16
          11023  0.014383        $  Na-23
          13027  0.065570        $  Al-27
          14000  0.207087        $  Si
          58000  0.002716        $  Ce
$************************************************************

$************************************************************
$  142 : Glass Scintillator, Li Doped  (KG1, KG2, KG3) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.420000 
$  Total atom density (atoms/b-cm) = 8.568E-02 
$  Composition by atom fraction 
M142       3000  0.239068        $  Li
           8016  0.546269        $  O-16
          14000  0.209481        $  Si
          58000  0.005182        $  Ce
$************************************************************

$************************************************************
$  143 : Glass, Borosilicate (Pyrex Glass) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.230000 
$  Total atom density (atoms/b-cm) = 7.064E-02 
$  Composition by atom fraction 
M143       5000  0.070449        $  B
           8016  0.641095        $  O-16
          11023  0.023311        $  Na-23
          13027  0.008204        $  Al-27
          14000  0.255327        $  Si
          19000  0.001615        $  K
$************************************************************

$************************************************************
$  144 : Glass, Foam 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.128000 
$  Total atom density (atoms/b-cm) = 4.086E-03 
$  Composition by atom fraction 
M144       1001  0.018718        $  H-1
           5000  0.026176        $  B
           8016  0.629684        $  O-16
          11023  0.132122        $  Na-23
          14000  0.187416        $  Si
          16000  0.005884        $  S
$************************************************************

$************************************************************
$  145 : Glass, Lead 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 6.220000 
$  Total atom density (atoms/b-cm) = 6.177E-02 
$  Composition by atom fraction 
M145       8016  0.592955        $  O-16
          14000  0.174592        $  Si
          22000  0.010251        $  Ti
          33075  0.002146        $  As-75
          82000  0.220056        $  Pb
$************************************************************

$************************************************************
$  146 : Glass, Plate 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.400000 
$  Total atom density (atoms/b-cm) = 6.878E-02 
$  Composition by atom fraction 
M146       8016  0.603858        $  O-16
          11023  0.088145        $  Na-23
          14000  0.251791        $  Si
          20000  0.056205        $  Ca
$************************************************************

$************************************************************
$  147 : Glycerol 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C3H8O3 
$  Molecular weight (g/mole) = 92.09382 
$  Density (g/cm3) = 1.261300 
$  Total atom density (atoms/b-cm) = 1.155E-01 
$  Composition by atom fraction 
M147       1001  0.571417        $  H-1
           6000  0.214294        $  C
           8016  0.214289        $  O-16
$************************************************************

$************************************************************
$  148 : Gold 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Au 
$  Molecular weight (g/mole) = 196.96655 
$  Density (g/cm3) = 19.320000 
$  Total atom density (atoms/b-cm) = 5.907E-02 
$  Composition by atom fraction 
M148      79197  1.000000        $  Au-197
$************************************************************

$************************************************************
$  149 : Gypsum (Plaster of Paris) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CaSO4-2(H2O) 
$  Molecular weight (g/mole) = 172.17116 
$  Density (g/cm3) = 2.320000 
$  Total atom density (atoms/b-cm) = 9.738E-02 
$  Composition by atom fraction 
M149       1001  0.333321        $  H-1
           8016  0.500014        $  O-16
          16000  0.083324        $  S
          20000  0.083341        $  Ca
$************************************************************

$************************************************************
$  150 : He-3 proportional gas 
$  Source = PNNL-15870 Rev. 1 
$  Formula = He-3 
$  Molecular weight (g/mole) = 3.0160293097 
$  Density (g/cm3) = 0.000125 
$  Total atom density (atoms/b-cm) = 2.501E-05 
$  Composition by atom fraction 
M150       2003  1.000000        $  He-3
$************************************************************

$************************************************************
$  151 : Helium, Natural 
$  Source = PNNL-15870 Rev. 1 
$  Formula = He 
$  Molecular weight (g/mole) = 4.002602 
$  Density (g/cm3) = 0.000166 
$  Total atom density (atoms/b-cm) = 2.502E-05 
$  Composition by atom fraction 
M151       2004  1.000000        $  He-4
$************************************************************

$************************************************************
$  152 : Hydrogen 
$  Source = PNNL-15870 Rev. 1 
$  Formula = H2 
$  Molecular weight (g/mole) = 2.01588 
$  Density (g/cm3) = 0.000084 
$  Total atom density (atoms/b-cm) = 5.004E-05 
$  Composition by atom fraction 
M152       1001  1.000000        $  H-1
$************************************************************

$************************************************************
$  153 : Incoloy-800 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.940000 
$  Total atom density (atoms/b-cm) = 8.672E-02 
$  Composition by atom fraction 
M153       6000  0.002984        $  C
          13027  0.007663        $  Al-27
          14000  0.012760        $  Si
          16000  0.000172        $  S
          22000  0.004319        $  Ti
          24000  0.222681        $  Cr
          25055  0.009785        $  Mn-55
          26000  0.430099        $  Fe
          28000  0.305302        $  Ni
          29000  0.004234        $  Cu
$************************************************************

$************************************************************
$  154 : Inconel-600 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.470000 
$  Total atom density (atoms/b-cm) = 8.966E-02 
$  Composition by atom fraction 
M154       6000  0.004642        $  C
          14000  0.006583        $  Si
          16000  0.000177        $  S
          24000  0.169591        $  Cr
          25055  0.006731        $  Mn-55
          26000  0.081498        $  Fe
          28000  0.727867        $  Ni
          29000  0.002910        $  Cu
$************************************************************

$************************************************************
$  155 : Inconel-625 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.320000 
$  Total atom density (atoms/b-cm) = 7.799E-02 
$  Composition by atom fraction 
M155       1001  0.133302        $  H-1
           6000  0.082334        $  C
           7014  0.000256        $  N-14
           8016  0.542947        $  O-16
          11023  0.004909        $  Na-23
          12000  0.009213        $  Mg
          13027  0.014408        $  Al-27
          14000  0.098869        $  Si
          16000  0.001062        $  S
          19000  0.006277        $  K
          20000  0.102809        $  Ca
          22000  0.000374        $  Ti
          26000  0.003240        $  Fe
$************************************************************

$************************************************************
$  156 : Inconel-718 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.190000 
$  Total atom density (atoms/b-cm) = 8.547E-02 
$  Composition by atom fraction 
M156       5000  0.000267        $  B
           6000  0.003507        $  C
          13027  0.010694        $  Al-27
          14000  0.006534        $  Si
          15031  0.000261        $  P-31
          16000  0.000252        $  S
          22000  0.010850        $  Ti
          24000  0.210871        $  Cr
          25055  0.003340        $  Mn-55
          26000  0.175671        $  Fe
          28000  0.516184        $  Ni
          27059  0.008911        $  Co-59
          29000  0.002479        $  Cu
          41093  0.031833        $  Nb-93
          42000  0.018346        $  Mo
$************************************************************

$************************************************************
$  157 : Indium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = In 
$  Molecular weight (g/mole) = 114.818 
$  Density (g/cm3) = 7.310000 
$  Total atom density (atoms/b-cm) = 3.834E-02 
$  Composition by atom fraction 
M157      49000  1.000000        $  In
$************************************************************

$************************************************************
$  158 : Iron 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Fe 
$  Molecular weight (g/mole) = 55.845 
$  Density (g/cm3) = 7.874000 
$  Total atom density (atoms/b-cm) = 8.491E-02 
$  Composition by atom fraction 
M158      26000  1.000000        $  Fe
$************************************************************

$************************************************************
$  159 : Iron Boride (Fe2B) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Fe2B 
$  Molecular weight (g/mole) = 122.501 
$  Density (g/cm3) = 7.300000 
$  Total atom density (atoms/b-cm) = 1.077E-01 
$  Composition by atom fraction 
M159       5000  0.333333        $  B
          26000  0.666667        $  Fe
$************************************************************

$************************************************************
$  160 : Iron Boride (FeB) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = FeB 
$  Molecular weight (g/mole) = 66.656 
$  Density (g/cm3) = 7.150000 
$  Total atom density (atoms/b-cm) = 1.292E-01 
$  Composition by atom fraction 
M160       5000  0.499969        $  B
          26000  0.500031        $  Fe
$************************************************************

$************************************************************
$  161 : Iron, Armco Ingot 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.866000 
$  Total atom density (atoms/b-cm) = 8.511E-02 
$  Composition by atom fraction 
M161       6000  0.000556        $  C
           8016  0.003826        $  O-16
          15031  0.000090        $  P-31
          16000  0.000434        $  S
          25055  0.000172        $  Mn-55
          26000  0.994921        $  Fe
$************************************************************

$************************************************************
$  162 : Iron, Cast (gray) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.150000 
$  Total atom density (atoms/b-cm) = 8.890E-02 
$  Composition by atom fraction 
M162       6000  0.137104        $  C
          14000  0.044836        $  Si
          15031  0.004691        $  P-31
          16000  0.001510        $  S
          25055  0.005730        $  Mn-55
          26000  0.806128        $  Fe
$************************************************************

$************************************************************
$  163 : Iron, Wrought (Byers No.1) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.700000 
$  Total atom density (atoms/b-cm) = 8.346E-02 
$  Composition by atom fraction 
M163       6000  0.003746        $  C
          14000  0.003164        $  Si
          15031  0.001126        $  P-31
          16000  0.000175        $  S
          25055  0.000154        $  Mn-55
          26000  0.991636        $  Fe
$************************************************************

$************************************************************
$  164 : Kaowool 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.096000 
$  Total atom density (atoms/b-cm) = 2.841E-03 
$  Composition by atom fraction 
M164       5000  0.000468        $  B
           8016  0.636102        $  O-16
          13027  0.179644        $  Al-27
          14000  0.176542        $  Si
          20000  0.000363        $  Ca
          22000  0.004332        $  Ti
          26000  0.002549        $  Fe
$************************************************************

$************************************************************
$  165 : Kapton Polyimide Film 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.420000 
$  Total atom density (atoms/b-cm) = 8.723E-02 
$  Composition by atom fraction 
M165       1001  0.256399        $  H-1
           6000  0.564114        $  C
           7014  0.051282        $  N-14
           8016  0.128205        $  O-16
$************************************************************

$************************************************************
$  166 : Kennertium 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 16.800000 
$  Total atom density (atoms/b-cm) = 8.122E-02 
$  Composition by atom fraction 
M166      28000  0.191007        $  Ni
          29000  0.294036        $  Cu
          74000  0.514957        $  W
$************************************************************

$************************************************************
$  167 : Kernite 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Na2B4O7-4(H2O) 
$  Molecular weight (g/mole) = 273.28046 
$  Density (g/cm3) = 1.950000 
$  Total atom density (atoms/b-cm) = 1.074E-01 
$  Composition by atom fraction 
M167       1001  0.320000        $  H-1
           5000  0.160000        $  B
           8016  0.440000        $  O-16
          11023  0.080000        $  Na-23
$************************************************************

$************************************************************
$  168 : Kerosene 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C14H30 
$  Molecular weight (g/mole) = 198.388 
$  Density (g/cm3) = 0.819000 
$  Total atom density (atoms/b-cm) = 1.128E-01 
$  Composition by atom fraction 
M168       1001  0.694164        $  H-1
           6000  0.305836        $  C
$************************************************************

$************************************************************
$  169 : Krypton 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Kr 
$  Molecular weight (g/mole) = 83.798 
$  Density (g/cm3) = 0.003478 
$  Total atom density (atoms/b-cm) = 2.500E-05 
$  Composition by atom fraction 
M169      36000  1.000000        $  Kr
$************************************************************

$************************************************************
$  170 : Kynar 
$  Source = PNNL-15870 Rev. 1 
$  Formula = H2C2F2 
$  Molecular weight (g/mole) = 64.0340864 
$  Density (g/cm3) = 1.790000 
$  Total atom density (atoms/b-cm) = 1.010E-01 
$  Composition by atom fraction 
M170       1001  0.333333        $  H-1
           6000  0.333333        $  C
           9019  0.333333        $  F-19
$************************************************************

$************************************************************
$  171 : Lead 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Pb 
$  Molecular weight (g/mole) = 207.2 
$  Density (g/cm3) = 11.350000 
$  Total atom density (atoms/b-cm) = 3.299E-02 
$  Composition by atom fraction 
M171      82000  1.000000        $  Pb
$************************************************************

$************************************************************
$  172 : Lead Tungstate (PWO) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PbWO4 
$  Molecular weight (g/mole) = 455.0376 
$  Density (g/cm3) = 8.240000 
$  Total atom density (atoms/b-cm) = 6.543E-02 
$  Composition by atom fraction 
M172       8016  0.666667        $  O-16
          74000  0.166667        $  W
          82000  0.166667        $  Pb
$************************************************************

$************************************************************
$  173 : Lithium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Li 
$  Molecular weight (g/mole) = 6.941 
$  Density (g/cm3) = 0.534000 
$  Total atom density (atoms/b-cm) = 4.633E-02 
$  Composition by atom fraction 
M173       3000  1.000000        $  Li
$************************************************************

$************************************************************
$  174 : Lithium Amide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = LiNH2 
$  Molecular weight (g/mole) = 22.96358 
$  Density (g/cm3) = 1.178000 
$  Total atom density (atoms/b-cm) = 1.236E-01 
$  Composition by atom fraction 
M174       1001  0.499991        $  H-1
           3000  0.250004        $  Li
           7014  0.250005        $  N-14
$************************************************************

$************************************************************
$  175 : Lithium Fluoride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = LiF 
$  Molecular weight (g/mole) = 25.9394032 
$  Density (g/cm3) = 2.635000 
$  Total atom density (atoms/b-cm) = 1.223E-01 
$  Composition by atom fraction 
M175       3000  0.500000        $  Li
           9019  0.500000        $  F-19
$************************************************************

$************************************************************
$  176 : Lithium Gadrium Borate (LGB) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Li6Gd(BO3)3 
$  Molecular weight (g/mole) = 367.3741448 
$  Density (g/cm3) = 3.500000 
$  Total atom density (atoms/b-cm) = 1.090E-01 
$  Composition by atom fraction 
M176       3006  0.315789        $  Li-6
           5010  0.157895        $  B-10
           8016  0.473684        $  O-16
          64000  0.052632        $  Gd
$************************************************************

$************************************************************
$  177 : Lithium Hydride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = LiH 
$  Molecular weight (g/mole) = 7.94894 
$  Density (g/cm3) = 0.820000 
$  Total atom density (atoms/b-cm) = 1.242E-01 
$  Composition by atom fraction 
M177       1001  0.499989        $  H-1
           3000  0.500011        $  Li
$************************************************************

$************************************************************
$  178 : Lithium Iodide (high density) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = LiI 
$  Molecular weight (g/mole) = 133.84547 
$  Density (g/cm3) = 4.080000 
$  Total atom density (atoms/b-cm) = 3.671E-02 
$  Composition by atom fraction 
M178       3000  0.499998        $  Li
          53127  0.500002        $  I-127
$************************************************************

$************************************************************
$  179 : Lithium Iodide (low density) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = LiI 
$  Molecular weight (g/mole) = 133.84547 
$  Density (g/cm3) = 3.494000 
$  Total atom density (atoms/b-cm) = 3.144E-02 
$  Composition by atom fraction 
M179       3000  0.499998        $  Li
          53127  0.500002        $  I-127
$************************************************************

$************************************************************
$  180 : Lithium Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Li2O 
$  Molecular weight (g/mole) = 29.8814 
$  Density (g/cm3) = 2.013000 
$  Total atom density (atoms/b-cm) = 1.217E-01 
$  Composition by atom fraction 
M180       3000  0.666667        $  Li
           8016  0.333333        $  O-16
$************************************************************

$************************************************************
$  181 : Lithium Tetraborate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Li2B4O7 
$  Molecular weight (g/mole) = 169.1218 
$  Density (g/cm3) = 2.440000 
$  Total atom density (atoms/b-cm) = 1.129E-01 
$  Composition by atom fraction 
M181       3000  0.153851        $  Li
           5000  0.307673        $  B
           8016  0.538476        $  O-16
$************************************************************

$************************************************************
$  182 : Lucite 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C5O2H8 
$  Molecular weight (g/mole) = 100.11582 
$  Density (g/cm3) = 1.190000 
$  Total atom density (atoms/b-cm) = 1.074E-01 
$  Composition by atom fraction 
M182       1001  0.533320        $  H-1
           6000  0.333345        $  C
           8016  0.133335        $  O-16
$************************************************************

$************************************************************
$  183 : Lutetium Aluminum Garnet (LuAG) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Al5Lu3O12 
$  Molecular weight (g/mole) = 851.80149 
$  Density (g/cm3) = 6.730000 
$  Total atom density (atoms/b-cm) = 9.516E-02 
$  Composition by atom fraction 
M183       8016  0.600000        $  O-16
          13027  0.250000        $  Al-27
          71000  0.150000        $  Lu
$************************************************************

$************************************************************
$  184 : Lutetium Orthoaluminate (LuAP) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = LuAlO3 
$  Molecular weight (g/mole) = 249.946738 
$  Density (g/cm3) = 8.400000 
$  Total atom density (atoms/b-cm) = 1.012E-01 
$  Composition by atom fraction 
M184       8016  0.600000        $  O-16
          13027  0.200000        $  Al-27
          71000  0.200000        $  Lu
$************************************************************

$************************************************************
$  185 : Lutetium Oxyorthosilicate (LSO) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Lu2SiO5 
$  Molecular weight (g/mole) = 458.0165 
$  Density (g/cm3) = 7.400000 
$  Total atom density (atoms/b-cm) = 7.784E-02 
$  Composition by atom fraction 
M185       8016  0.625000        $  O-16
          14000  0.125000        $  Si
          71000  0.250000        $  Lu
$************************************************************

$************************************************************
$  186 : Lutetium Yttrium OxyorthoSilicate (LYSO) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Lu2Y2SiO5 
$  Molecular weight (g/mole) = 635.8282 
$  Density (g/cm3) = 7.300000 
$  Total atom density (atoms/b-cm) = 6.914E-02 
$  Composition by atom fraction 
M186       8016  0.500000        $  O-16
          14000  0.100000        $  Si
          39089  0.200000        $  Y-89
          71000  0.200000        $  Lu
$************************************************************

$************************************************************
$  187 : Magnesium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Mg 
$  Molecular weight (g/mole) = 24.305 
$  Density (g/cm3) = 1.740000 
$  Total atom density (atoms/b-cm) = 4.311E-02 
$  Composition by atom fraction 
M187      12000  1.000000        $  Mg
$************************************************************

$************************************************************
$  188 : Magnesium Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = MgO 
$  Molecular weight (g/mole) = 40.3044 
$  Density (g/cm3) = 3.580000 
$  Total atom density (atoms/b-cm) = 1.070E-01 
$  Composition by atom fraction 
M188       8016  0.500000        $  O-16
          12000  0.500000        $  Mg
$************************************************************

$************************************************************
$  189 : Magnesium Tetraborate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = MgB4O7 
$  Molecular weight (g/mole) = 179.5448 
$  Density (g/cm3) = 2.530000 
$  Total atom density (atoms/b-cm) = 1.018E-01 
$  Composition by atom fraction 
M189       5000  0.333313        $  B
           8016  0.583351        $  O-16
          12000  0.083336        $  Mg
$************************************************************

$************************************************************
$  190 : Masonite 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C6H10O5 
$  Molecular weight (g/mole) = 162.1406 
$  Density (g/cm3) = 1.300000 
$  Total atom density (atoms/b-cm) = 1.014E-01 
$  Composition by atom fraction 
M190       1001  0.476190        $  H-1
           6000  0.285714        $  C
           8016  0.238095        $  O-16
$************************************************************

$************************************************************
$  191 : Melamine 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C5H7N6 
$  Molecular weight (g/mole) = 151.14928 
$  Density (g/cm3) = 1.350000 
$  Total atom density (atoms/b-cm) = 9.682E-02 
$  Composition by atom fraction 
M191       1001  0.388889        $  H-1
           6000  0.277778        $  C
           7014  0.333333        $  N-14
$************************************************************

$************************************************************
$  192 : Mercury 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Hg 
$  Molecular weight (g/mole) = 200.59 
$  Density (g/cm3) = 13.546000 
$  Total atom density (atoms/b-cm) = 4.067E-02 
$  Composition by atom fraction 
M192      80000  1.000000        $  Hg
$************************************************************

$************************************************************
$  193 : Mercury Iodide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = HgI2 
$  Molecular weight (g/mole) = 454.39894 
$  Density (g/cm3) = 6.360000 
$  Total atom density (atoms/b-cm) = 2.529E-02 
$  Composition by atom fraction 
M193      53127  0.666667        $  I-127
          80000  0.333333        $  Hg
$************************************************************

$************************************************************
$  194 : Methane 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CH4 
$  Molecular weight (g/mole) = 16.04246 
$  Density (g/cm3) = 0.000667 
$  Total atom density (atoms/b-cm) = 1.252E-04 
$  Composition by atom fraction 
M194       1001  0.800000        $  H-1
           6000  0.200000        $  C
$************************************************************

$************************************************************
$  195 : Methanol 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CH4O 
$  Molecular weight (g/mole) = 32.04186 
$  Density (g/cm3) = 0.791400 
$  Total atom density (atoms/b-cm) = 8.924E-02 
$  Composition by atom fraction 
M195       1001  0.666654        $  H-1
           6000  0.166675        $  C
           8016  0.166671        $  O-16
$************************************************************

$************************************************************
$  196 : Methylene Chloride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = CH2Cl2 
$  Molecular weight (g/mole) = 84.93258 
$  Density (g/cm3) = 1.326600 
$  Total atom density (atoms/b-cm) = 4.703E-02 
$  Composition by atom fraction 
M196       1001  0.400000        $  H-1
           6000  0.200000        $  C
          17000  0.400000        $  Cl
$************************************************************

$************************************************************
$  197 : Molybdenum 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Mo 
$  Molecular weight (g/mole) = 95.94 
$  Density (g/cm3) = 10.220000 
$  Total atom density (atoms/b-cm) = 6.415E-02 
$  Composition by atom fraction 
M197      42000  1.000000        $  Mo
$************************************************************

$************************************************************
$  198 : Monosodium Titanate, MST 
$  Source = PNNL-15870 Rev. 1 
$  Formula = NaTi2O5H 
$  Molecular weight (g/mole) = 199.72871 
$  Density (g/cm3) = 1.000000 
$  Total atom density (atoms/b-cm) = 2.714E-02 
$  Composition by atom fraction 
M198       1001  0.111111        $  H-1
           8016  0.555556        $  O-16
          11023  0.111111        $  Na-23
          22000  0.222222        $  Ti
$************************************************************

$************************************************************
$  199 : Muscle Equivalent-Liquid, with sucrose 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.110000 
$  Total atom density (atoms/b-cm) = 1.052E-01 
$  Composition by atom fraction 
M199       1001  0.619265        $  H-1
           6000  0.082642        $  C
           7014  0.016082        $  N-14
           8016  0.282011        $  O-16
$************************************************************

$************************************************************
$  200 : Muscle Equivalent-Liquid, without sucrose 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.070000 
$  Total atom density (atoms/b-cm) = 1.032E-01 
$  Composition by atom fraction 
M200       1001  0.631883        $  H-1
           6000  0.062435        $  C
           7014  0.015809        $  N-14
           8016  0.289874        $  O-16
$************************************************************

$************************************************************
$  201 : Muscle, Skeletal 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.040000 
$  Total atom density (atoms/b-cm) = 9.911E-02 
$  Composition by atom fraction 
M201       1001  0.630932        $  H-1
           6000  0.056732        $  C
           7014  0.012488        $  N-14
           8016  0.298107        $  O-16
          11023  0.000206        $  Na-23
          12000  0.000049        $  Mg
          15031  0.000367        $  P-31
          16000  0.000475        $  S
          17000  0.000141        $  Cl
          19000  0.000488        $  K
          20000  0.000005        $  Ca
          26000  0.000005        $  Fe
          30000  0.000005        $  Zn
$************************************************************

$************************************************************
$  202 : Muscle, Striated 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.040000 
$  Total atom density (atoms/b-cm) = 1.001E-01 
$  Composition by atom fraction 
M202       1001  0.633101        $  H-1
           6000  0.064070        $  C
           7014  0.015633        $  N-14
           8016  0.285066        $  O-16
          11023  0.000218        $  Na-23
          12000  0.000051        $  Mg
          15031  0.000404        $  P-31
          16000  0.000976        $  S
          19000  0.000480        $  K
$************************************************************

$************************************************************
$  203 : Neon 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Ne 
$  Molecular weight (g/mole) = 20.1797 
$  Density (g/cm3) = 0.000839 
$  Total atom density (atoms/b-cm) = 2.502E-05 
$  Composition by atom fraction 
M203      10020  1.000000        $  Ne-20
$************************************************************

$************************************************************
$  204 : Nickel 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Ni 
$  Molecular weight (g/mole) = 58.6934 
$  Density (g/cm3) = 8.902000 
$  Total atom density (atoms/b-cm) = 9.134E-02 
$  Composition by atom fraction 
M204      28000  1.000000        $  Ni
$************************************************************

$************************************************************
$  205 : Niobium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Nb 
$  Molecular weight (g/mole) = 92.90638 
$  Density (g/cm3) = 8.570000 
$  Total atom density (atoms/b-cm) = 5.555E-02 
$  Composition by atom fraction 
M205      41093  1.000000        $  Nb-93
$************************************************************

$************************************************************
$  206 : Nitrogen 
$  Source = PNNL-15870 Rev. 1 
$  Formula = N2 
$  Molecular weight (g/mole) = 28.0134 
$  Density (g/cm3) = 0.001165 
$  Total atom density (atoms/b-cm) = 5.010E-05 
$  Composition by atom fraction 
M206       7014  1.000000        $  N-14
$************************************************************

$************************************************************
$  207 : Nylon, Dupont ELVAmide 8062 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.080000 
$  Total atom density (atoms/b-cm) = 1.126E-01 
$  Composition by atom fraction 
M207       1001  0.593363        $  H-1
           6000  0.311934        $  C
           7014  0.041060        $  N-14
           8016  0.053643        $  O-16
$************************************************************

$************************************************************
$  208 : Nylon, Type 11 (Rilsan) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.425000 
$  Total atom density (atoms/b-cm) = 1.592E-01 
$  Composition by atom fraction 
M208       1001  0.617633        $  H-1
           6000  0.323542        $  C
           7014  0.029412        $  N-14
           8016  0.029412        $  O-16
$************************************************************

$************************************************************
$  209 : Nylon, Type 6 and Type 6/6 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C12H22N2O2 
$  Molecular weight (g/mole) = 226.31528 
$  Density (g/cm3) = 1.140000 
$  Total atom density (atoms/b-cm) = 1.153E-01 
$  Composition by atom fraction 
M209       1001  0.578932        $  H-1
           6000  0.315803        $  C
           7014  0.052632        $  N-14
           8016  0.052633        $  O-16
$************************************************************

$************************************************************
$  210 : Nylon, Type 6/10 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.140000 
$  Total atom density (atoms/b-cm) = 1.215E-01 
$  Composition by atom fraction 
M210       1001  0.599986        $  H-1
           6000  0.320013        $  C
           7014  0.040001        $  N-14
           8016  0.040001        $  O-16
$************************************************************

$************************************************************
$  211 : Oil, Crude (Heavy, Cold Lake, Canada) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.970000 
$  Total atom density (atoms/b-cm) = 1.024E-01 
$  Composition by atom fraction 
M211       1001  0.588884        $  H-1
           6000  0.397730        $  C
           7014  0.001630        $  N-14
           8016  0.003924        $  O-16
          16000  0.007832        $  S
$************************************************************

$************************************************************
$  212 : Oil, Crude (Heavy, Mexican) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.975000 
$  Total atom density (atoms/b-cm) = 1.031E-01 
$  Composition by atom fraction 
M212       1001  0.587752        $  H-1
           6000  0.404749        $  C
          16000  0.007499        $  S
$************************************************************

$************************************************************
$  213 : Oil, Crude (Heavy, Qayarah, Iraq) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.970000 
$  Total atom density (atoms/b-cm) = 1.002E-01 
$  Composition by atom fraction 
M213       1001  0.590046        $  H-1
           6000  0.391765        $  C
           7014  0.002914        $  N-14
          16000  0.015275        $  S
$************************************************************

$************************************************************
$  214 : Oil, Crude (Light, Texas) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.875000 
$  Total atom density (atoms/b-cm) = 1.024E-01 
$  Composition by atom fraction 
M214       1001  0.629388        $  H-1
           6000  0.365220        $  C
           7014  0.002578        $  N-14
          16000  0.002815        $  S
$************************************************************

$************************************************************
$  215 : Oil, Fuel (Calif.) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.955000 
$  Total atom density (atoms/b-cm) = 1.133E-01 
$  Composition by atom fraction 
M215       1001  0.633782        $  H-1
           6000  0.364349        $  C
          16000  0.001870        $  S
$************************************************************

$************************************************************
$  216 : Oil, Hydraulic 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C40H33O4Cl6P 
$  Molecular weight (g/mole) = 821.379381 
$  Density (g/cm3) = 0.871000 
$  Total atom density (atoms/b-cm) = 5.364E-02 
$  Composition by atom fraction 
M216       1001  0.392857        $  H-1
           6000  0.476190        $  C
           8016  0.047619        $  O-16
          15031  0.011905        $  P-31
          17000  0.071429        $  Cl
$************************************************************

$************************************************************
$  217 : Oil, Lard 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C10H18O 
$  Molecular weight (g/mole) = 154.24932 
$  Density (g/cm3) = 0.915000 
$  Total atom density (atoms/b-cm) = 1.036E-01 
$  Composition by atom fraction 
M217       1001  0.620690        $  H-1
           6000  0.344828        $  C
           8016  0.034483        $  O-16
$************************************************************

$************************************************************
$  218 : Oxygen 
$  Source = PNNL-15870 Rev. 1 
$  Formula = O2 
$  Molecular weight (g/mole) = 31.9988 
$  Density (g/cm3) = 0.001332 
$  Total atom density (atoms/b-cm) = 5.012E-05 
$  Composition by atom fraction 
M218       8016  1.000000        $  O-16
$************************************************************

$************************************************************
$  219 : P-10 gas 
$  Source = PNNL-15870 Rev. 1 
$  Formula = 90% Ar, 10% CH4 
$  Molecular weight (g/mole) = 37.557446 
$  Density (g/cm3) = 0.001561 
$  Total atom density (atoms/b-cm) = 3.505E-05 
$  Composition by atom fraction 
M219       1001  0.285714        $  H-1
           6000  0.071429        $  C
          18000  0.642857        $  Ar
$************************************************************

$************************************************************
$  220 : P-5 gas 
$  Source = PNNL-15870 Rev. 1 
$  Formula = 95% Ar, 5% CH4 
$  Molecular weight (g/mole) = 38.752723 
$  Density (g/cm3) = 0.001611 
$  Total atom density (atoms/b-cm) = 3.004E-05 
$  Composition by atom fraction 
M220       1001  0.166667        $  H-1
           6000  0.041667        $  C
          18000  0.791667        $  Ar
$************************************************************

$************************************************************
$  221 : Palladium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Pd 
$  Molecular weight (g/mole) = 106.42 
$  Density (g/cm3) = 12.020000 
$  Total atom density (atoms/b-cm) = 6.802E-02 
$  Composition by atom fraction 
M221      46000  1.000000        $  Pd
$************************************************************

$************************************************************
$  222 : Photographic Emulsion, Gel in 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.291400 
$  Total atom density (atoms/b-cm) = 1.145E-01 
$  Composition by atom fraction 
M222       1001  0.546952        $  H-1
           6000  0.235246        $  C
           7014  0.053934        $  N-14
           8016  0.161564        $  O-16
          16000  0.002304        $  S
$************************************************************

$************************************************************
$  223 : Photographic Emulsion, Kodak Type AA 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.200000 
$  Total atom density (atoms/b-cm) = 9.105E-02 
$  Composition by atom fraction 
M223       1001  0.440293        $  H-1
           6000  0.255254        $  C
           7014  0.074899        $  N-14
           8016  0.148420        $  O-16
          35000  0.040572        $  Br
          47000  0.040562        $  Ag
$************************************************************

$************************************************************
$  224 : Photographic Emulsion, Standard Nuclear 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 3.815000 
$  Total atom density (atoms/b-cm) = 7.895E-02 
$  Composition by atom fraction 
M224       1001  0.407082        $  H-1
           6000  0.175079        $  C
           7014  0.040139        $  N-14
           8016  0.120227        $  O-16
          16000  0.001715        $  S
          35000  0.127140        $  Br
          47000  0.127902        $  Ag
          53127  0.000715        $  I-127
$************************************************************

$************************************************************
$  225 : Platinum 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Pt 
$  Molecular weight (g/mole) = 195.078 
$  Density (g/cm3) = 21.450000 
$  Total atom density (atoms/b-cm) = 6.622E-02 
$  Composition by atom fraction 
M225      78000  1.000000        $  Pt
$************************************************************

$************************************************************
$  226 : Plutonium Bromide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuBr3 
$  Molecular weight (g/mole) = 478.8329578603 
$  Density (g/cm3) = 6.750000 
$  Total atom density (atoms/b-cm) = 3.396E-02 
$  Composition by atom fraction 
M226      35000  0.750000        $  Br
          94238  0.000126        $  Pu-238
          94239  0.233817        $  Pu-239
          94240  0.014942        $  Pu-240
          94241  0.000992        $  Pu-241
          94242  0.000123        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  227 : Plutonium Carbide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuC 
$  Molecular weight (g/mole) = 251.1316578603 
$  Density (g/cm3) = 13.600000 
$  Total atom density (atoms/b-cm) = 6.523E-02 
$  Composition by atom fraction 
M227       6000  0.500000        $  C
          94238  0.000251        $  Pu-238
          94239  0.467635        $  Pu-239
          94240  0.029883        $  Pu-240
          94241  0.001984        $  Pu-241
          94242  0.000247        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  228 : Plutonium Chloride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuCl3 
$  Molecular weight (g/mole) = 345.4799578603 
$  Density (g/cm3) = 5.710000 
$  Total atom density (atoms/b-cm) = 3.981E-02 
$  Composition by atom fraction 
M228      17000  0.750000        $  Cl
          94238  0.000126        $  Pu-238
          94239  0.233817        $  Pu-239
          94240  0.014942        $  Pu-240
          94241  0.000992        $  Pu-241
          94242  0.000123        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  229 : Plutonium Dioxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuO2 
$  Molecular weight (g/mole) = 271.1197578603 
$  Density (g/cm3) = 11.460000 
$  Total atom density (atoms/b-cm) = 7.637E-02 
$  Composition by atom fraction 
M229       8016  0.666667        $  O-16
          94238  0.000167        $  Pu-238
          94239  0.311756        $  Pu-239
          94240  0.019922        $  Pu-240
          94241  0.001323        $  Pu-241
          94242  0.000165        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  230 : Plutonium Flouride (PuF3) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuF3 
$  Molecular weight (g/mole) = 296.1161674603 
$  Density (g/cm3) = 9.330000 
$  Total atom density (atoms/b-cm) = 7.590E-02 
$  Composition by atom fraction 
M230       9019  0.750000        $  F-19
          94238  0.000126        $  Pu-238
          94239  0.233817        $  Pu-239
          94240  0.014942        $  Pu-240
          94241  0.000992        $  Pu-241
          94242  0.000123        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  231 : Plutonium Flouride (PuF4) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuF4 
$  Molecular weight (g/mole) = 315.1145706603 
$  Density (g/cm3) = 7.000000 
$  Total atom density (atoms/b-cm) = 6.689E-02 
$  Composition by atom fraction 
M231       9019  0.800000        $  F-19
          94238  0.000100        $  Pu-238
          94239  0.187054        $  Pu-239
          94240  0.011953        $  Pu-240
          94241  0.000794        $  Pu-241
          94242  0.000099        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  232 : Plutonium Flouride (PuF6) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuF6 
$  Molecular weight (g/mole) = 353.1113770603 
$  Density (g/cm3) = 5.080000 
$  Total atom density (atoms/b-cm) = 6.065E-02 
$  Composition by atom fraction 
M232       9019  0.857143        $  F-19
          94238  0.000072        $  Pu-238
          94239  0.133610        $  Pu-239
          94240  0.008538        $  Pu-240
          94241  0.000567        $  Pu-241
          94242  0.000071        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  233 : Plutonium Iodide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuI3 
$  Molecular weight (g/mole) = 619.8343678603 
$  Density (g/cm3) = 6.920000 
$  Total atom density (atoms/b-cm) = 2.689E-02 
$  Composition by atom fraction 
M233      53127  0.750000        $  I-127
          94238  0.000126        $  Pu-238
          94239  0.233817        $  Pu-239
          94240  0.014942        $  Pu-240
          94241  0.000992        $  Pu-241
          94242  0.000123        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  234 : Plutonium Nitrate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Pu(NO3)4 
$  Molecular weight (g/mole) = 487.1405578603 
$  Density (g/cm3) = 2.447000 
$  Total atom density (atoms/b-cm) = 5.143E-02 
$  Composition by atom fraction 
M234       7014  0.235294        $  N-14
           8016  0.705882        $  O-16
          94238  0.000030        $  Pu-238
          94239  0.055016        $  Pu-239
          94240  0.003516        $  Pu-240
          94241  0.000233        $  Pu-241
          94242  0.000029        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  235 : Plutonium Nitride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuN 
$  Molecular weight (g/mole) = 253.1276578603 
$  Density (g/cm3) = 14.250000 
$  Total atom density (atoms/b-cm) = 6.780E-02 
$  Composition by atom fraction 
M235       7014  0.500000        $  N-14
          94238  0.000251        $  Pu-238
          94239  0.467635        $  Pu-239
          94240  0.029883        $  Pu-240
          94241  0.001984        $  Pu-241
          94242  0.000247        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  236 : Plutonium Oxide (Pu2O3) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Pu2O3 
$  Molecular weight (g/mole) = 526.2401157206 
$  Density (g/cm3) = 10.500000 
$  Total atom density (atoms/b-cm) = 6.008E-02 
$  Composition by atom fraction 
M236       8016  0.600000        $  O-16
          94238  0.000201        $  Pu-238
          94239  0.374108        $  Pu-239
          94240  0.023907        $  Pu-240
          94241  0.001587        $  Pu-241
          94242  0.000198        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  237 : Plutonium Oxide (PuO) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = PuO 
$  Molecular weight (g/mole) = 255.1203578603 
$  Density (g/cm3) = 14.000000 
$  Total atom density (atoms/b-cm) = 6.609E-02 
$  Composition by atom fraction 
M237       8016  0.500000        $  O-16
          94238  0.000251        $  Pu-238
          94239  0.467635        $  Pu-239
          94240  0.029883        $  Pu-240
          94241  0.001984        $  Pu-241
          94242  0.000247        $  Pu-242
          95241  0.000000        $  Am-241
$************************************************************

$************************************************************
$  238 : Plutonium, Aged WGPu (A: 4-7% Pu-240) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 19.840000 
$  Total atom density (atoms/b-cm) = 4.997E-02 
$  Composition by atom fraction 
M238      94238  0.000100        $  Pu-238
          94239  0.936559        $  Pu-239
          94240  0.059677        $  Pu-240
          94241  0.001981        $  Pu-241
          94242  0.000296        $  Pu-242
          95241  0.001387        $  Am-241
$************************************************************

$************************************************************
$  239 : Plutonium, Aged WGPu (B: 10-13% Pu-240) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 19.840000 
$  Total atom density (atoms/b-cm) = 4.995E-02 
$  Composition by atom fraction 
M239      94238  0.000897        $  Pu-238
          94239  0.862470        $  Pu-239
          94240  0.116670        $  Pu-240
          94241  0.009838        $  Pu-241
          94242  0.001666        $  Pu-242
          95241  0.008460        $  Am-241
$************************************************************

$************************************************************
$  240 : Plutonium, Aged WGPu (C: 16-19% Pu-240) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 19.840000 
$  Total atom density (atoms/b-cm) = 4.993E-02 
$  Composition by atom fraction 
M240      94238  0.002347        $  Pu-238
          94239  0.785422        $  Pu-239
          94240  0.164652        $  Pu-240
          94241  0.013905        $  Pu-241
          94242  0.006635        $  Pu-242
          95241  0.027038        $  Am-241
$************************************************************

$************************************************************
$  241 : Plutonium, DOE 3013 WGPu 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 19.840000 
$  Total atom density (atoms/b-cm) = 4.997E-02 
$  Composition by atom fraction 
M241      94238  0.000502        $  Pu-238
          94239  0.935269        $  Pu-239
          94240  0.059767        $  Pu-240
          94241  0.003968        $  Pu-241
          94242  0.000494        $  Pu-242
$************************************************************

$************************************************************
$  242 : Plutonium, Fuel Grade 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 19.840000 
$  Total atom density (atoms/b-cm) = 4.995E-02 
$  Composition by atom fraction 
M242      94238  0.001005        $  Pu-238
          94239  0.861564        $  Pu-239
          94240  0.119578        $  Pu-240
          94241  0.015877        $  Pu-241
          94242  0.001976        $  Pu-242
$************************************************************

$************************************************************
$  243 : Plutonium, Power Grade 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 19.840000 
$  Total atom density (atoms/b-cm) = 4.987E-02 
$  Composition by atom fraction 
M243      94238  0.009965        $  Pu-238
          94239  0.625153        $  Pu-239
          94240  0.217396        $  Pu-240
          94241  0.118086        $  Pu-241
          94242  0.029399        $  Pu-242
$************************************************************

$************************************************************
$  244 : Plutonium, Shefelbine WGPu 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 19.840000 
$  Total atom density (atoms/b-cm) = 4.997E-02 
$  Composition by atom fraction 
M244      94238  0.000301        $  Pu-238
          94239  0.939451        $  Pu-239
          94240  0.056777        $  Pu-240
          94241  0.002976        $  Pu-241
          94242  0.000296        $  Pu-242
          95241  0.000198        $  Am-241
$************************************************************

$************************************************************
$  245 : Polycarbonate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C16H14O3 
$  Molecular weight (g/mole) = 254.28056 
$  Density (g/cm3) = 1.200000 
$  Total atom density (atoms/b-cm) = 9.378E-02 
$  Composition by atom fraction 
M245       1001  0.424226        $  H-1
           6000  0.484864        $  C
           8016  0.090910        $  O-16
$************************************************************

$************************************************************
$  246 : Polyethylene Terephthalate (PET) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.380000 
$  Total atom density (atoms/b-cm) = 9.514E-02 
$  Composition by atom fraction 
M246       1001  0.363632        $  H-1
           6000  0.454552        $  C
           8016  0.181816        $  O-16
$************************************************************

$************************************************************
$  247 : Polyethylene, Borated 
$  Source = PNNL-15870 Rev. 1 
$  Formula = B4C in C2H4 
$  Density (g/cm3) = 1.000000 
$  Total atom density (atoms/b-cm) = 1.193E-01 
$  Composition by atom fraction 
M247       1001  0.627759        $  H-1
           5000  0.046690        $  B
           6000  0.325552        $  C
$************************************************************

$************************************************************
$  248 : Polyethylene, Non-borated 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2H4 
$  Molecular weight (g/mole) = 28.05316 
$  Density (g/cm3) = 0.930000 
$  Total atom density (atoms/b-cm) = 1.198E-01 
$  Composition by atom fraction 
M248       1001  0.666662        $  H-1
           6000  0.333338        $  C
$************************************************************

$************************************************************
$  249 : Polyisocyanurate (PIR) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C15H10N2O2 
$  Molecular weight (g/mole) = 250.2521 
$  Density (g/cm3) = 0.048200 
$  Total atom density (atoms/b-cm) = 3.364E-03 
$  Composition by atom fraction 
M249       1001  0.344828        $  H-1
           6000  0.517241        $  C
           7014  0.068966        $  N-14
           8016  0.068966        $  O-16
$************************************************************

$************************************************************
$  250 : Polypropylene (PP) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C3H6 
$  Molecular weight (g/mole) = 42.07974 
$  Density (g/cm3) = 0.900000 
$  Total atom density (atoms/b-cm) = 1.159E-01 
$  Composition by atom fraction 
M250       1001  0.666653        $  H-1
           6000  0.333347        $  C
$************************************************************

$************************************************************
$  251 : Polystyrene (PS) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C8H8 
$  Molecular weight (g/mole) = 104.14912 
$  Density (g/cm3) = 1.060000 
$  Total atom density (atoms/b-cm) = 9.807E-02 
$  Composition by atom fraction 
M251       1001  0.499994        $  H-1
           6000  0.500006        $  C
$************************************************************

$************************************************************
$  252 : Polytetrafluoroethylene (PTFE) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2F4 
$  Molecular weight (g/mole) = 100.0150128 
$  Density (g/cm3) = 2.250000 
$  Total atom density (atoms/b-cm) = 8.129E-02 
$  Composition by atom fraction 
M252       6000  0.333339        $  C
           9019  0.666661        $  F-19
$************************************************************

$************************************************************
$  253 : Polyurethane Foam (PUR) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.021000 
$  Total atom density (atoms/b-cm) = 1.429E-03 
$  Composition by atom fraction 
M253       1001  0.360023        $  H-1
           6000  0.400878        $  C
           7014  0.076459        $  N-14
           8016  0.162639        $  O-16
$************************************************************

$************************************************************
$  254 : Polyvinyl Acetate (PVA) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C4H6O2 
$  Molecular weight (g/mole) = 86.08924 
$  Density (g/cm3) = 1.190000 
$  Total atom density (atoms/b-cm) = 9.989E-02 
$  Composition by atom fraction 
M254       1001  0.499986        $  H-1
           6000  0.333345        $  C
           8016  0.166668        $  O-16
$************************************************************

$************************************************************
$  255 : Polyvinyl Chloride (PVC) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2H3Cl 
$  Molecular weight (g/mole) = 62.49822 
$  Density (g/cm3) = 1.406000 
$  Total atom density (atoms/b-cm) = 8.129E-02 
$  Composition by atom fraction 
M255       1001  0.499995        $  H-1
           6000  0.333340        $  C
          17000  0.166665        $  Cl
$************************************************************

$************************************************************
$  256 : Polyvinyl Toluene (PVT) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.032000 
$  Total atom density (atoms/b-cm) = 9.976E-02 
$  Composition by atom fraction 
M256       1001  0.525382        $  H-1
           6000  0.474618        $  C
$************************************************************

$************************************************************
$  257 : Polyvinylidene Chloride (PVDC) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C2H2Cl2 
$  Molecular weight (g/mole) = 96.94328 
$  Density (g/cm3) = 1.700000 
$  Total atom density (atoms/b-cm) = 6.336E-02 
$  Composition by atom fraction 
M257       1001  0.333317        $  H-1
           6000  0.333346        $  C
          17000  0.333337        $  Cl
$************************************************************

$************************************************************
$  258 : Potassium Aluminum Silicate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = KAlSi3O8 
$  Molecular weight (g/mole) = 278.331538 
$  Density (g/cm3) = 1.100000 
$  Total atom density (atoms/b-cm) = 3.094E-02 
$  Composition by atom fraction 
M258       8016  0.615385        $  O-16
          13027  0.076923        $  Al-27
          14000  0.230769        $  Si
          19000  0.076923        $  K
$************************************************************

$************************************************************
$  259 : Potassium Iodide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = KI 
$  Molecular weight (g/mole) = 166.00277 
$  Density (g/cm3) = 3.130000 
$  Total atom density (atoms/b-cm) = 2.271E-02 
$  Composition by atom fraction 
M259      19000  0.500000        $  K
          53127  0.500000        $  I-127
$************************************************************

$************************************************************
$  260 : Potassium Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = K2O 
$  Molecular weight (g/mole) = 94.196 
$  Density (g/cm3) = 2.320000 
$  Total atom density (atoms/b-cm) = 4.450E-02 
$  Composition by atom fraction 
M260       8016  0.333333        $  O-16
          19000  0.666667        $  K
$************************************************************

$************************************************************
$  261 : Propane (gas) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C3H8 
$  Molecular weight (g/mole) = 44.09562 
$  Density (g/cm3) = 0.001879 
$  Total atom density (atoms/b-cm) = 2.823E-04 
$  Composition by atom fraction 
M261       1001  0.727260        $  H-1
           6000  0.272740        $  C
$************************************************************

$************************************************************
$  262 : Propane (liquid) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C3H8 
$  Molecular weight (g/mole) = 44.09562 
$  Density (g/cm3) = 0.430000 
$  Total atom density (atoms/b-cm) = 6.460E-02 
$  Composition by atom fraction 
M262       1001  0.727260        $  H-1
           6000  0.272740        $  C
$************************************************************

$************************************************************
$  263 : P-terphenyl 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C14H10 
$  Molecular weight (g/mole) = 178.2292 
$  Density (g/cm3) = 1.230000 
$  Total atom density (atoms/b-cm) = 9.974E-02 
$  Composition by atom fraction 
M263       1001  0.416667        $  H-1
           6000  0.583333        $  C
$************************************************************

$************************************************************
$  264 : Radiochromic Dye Film, Nylon Base  (RDF: NB) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.080000 
$  Total atom density (atoms/b-cm) = 1.117E-01 
$  Composition by atom fraction 
M264       1001  0.589073        $  H-1
           6000  0.317171        $  C
           7014  0.041110        $  N-14
           8016  0.052646        $  O-16
$************************************************************

$************************************************************
$  265 : Rock (Average of 5 types) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.662000 
$  Total atom density (atoms/b-cm) = 8.028E-02 
$  Composition by atom fraction 
M265       1001  0.032837        $  H-1
           6000  0.044735        $  C
           8016  0.609276        $  O-16
          11023  0.010774        $  Na-23
          12000  0.019017        $  Mg
          13027  0.040162        $  Al-27
          14000  0.175088        $  Si
          16000  0.000359        $  S
          19000  0.009268        $  K
          20000  0.044775        $  Ca
          22000  0.001511        $  Ti
          25055  0.000140        $  Mn-55
          26000  0.011935        $  Fe
          82000  0.000121        $  Pb
$************************************************************

$************************************************************
$  266 : Rock, Basalt 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 3.010000 
$  Total atom density (atoms/b-cm) = 8.227E-02 
$  Composition by atom fraction 
M266       8016  0.607469        $  O-16
          11023  0.020797        $  Na-23
          12000  0.037964        $  Mg
          13027  0.068541        $  Al-27
          14000  0.182640        $  Si
          19000  0.005027        $  K
          20000  0.037918        $  Ca
          22000  0.005133        $  Ti
          25055  0.000618        $  Mn-55
          26000  0.033592        $  Fe
          82000  0.000302        $  Pb
$************************************************************

$************************************************************
$  267 : Rock, Granite 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.690000 
$  Total atom density (atoms/b-cm) = 7.784E-02 
$  Composition by atom fraction 
M267       8016  0.629769        $  O-16
          11023  0.024738        $  Na-23
          12000  0.003660        $  Mg
          13027  0.058764        $  Al-27
          14000  0.249093        $  Si
          19000  0.018174        $  K
          20000  0.006743        $  Ca
          22000  0.000780        $  Ti
          25055  0.000146        $  Mn-55
          26000  0.008033        $  Fe
          82000  0.000101        $  Pb
$************************************************************

$************************************************************
$  268 : Rock, Limestone 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.610000 
$  Total atom density (atoms/b-cm) = 8.206E-02 
$  Composition by atom fraction 
M268       1001  0.017089        $  H-1
           6000  0.181445        $  C
           8016  0.595930        $  O-16
          11023  0.000310        $  Na-23
          12000  0.037715        $  Mg
          13027  0.003019        $  Al-27
          14000  0.016653        $  Si
          16000  0.000120        $  S
          19000  0.000163        $  K
          20000  0.146173        $  Ca
          22000  0.000145        $  Ti
          26000  0.001205        $  Fe
          82000  0.000031        $  Pb
$************************************************************

$************************************************************
$  269 : Rock, Sandstone 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.320000 
$  Total atom density (atoms/b-cm) = 7.166E-02 
$  Composition by atom fraction 
M269       1001  0.034647        $  H-1
           6000  0.022161        $  C
           8016  0.633160        $  O-16
          11023  0.002518        $  Na-23
          12000  0.005807        $  Mg
          13027  0.018365        $  Al-27
          14000  0.254190        $  Si
          16000  0.000171        $  S
          19000  0.005798        $  K
          20000  0.019131        $  Ca
          22000  0.000488        $  Ti
          26000  0.003502        $  Fe
          82000  0.000063        $  Pb
$************************************************************

$************************************************************
$  270 : Rock, Shale 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 2.680000 
$  Total atom density (atoms/b-cm) = 8.625E-02 
$  Composition by atom fraction 
M270       1001  0.103900        $  H-1
           6000  0.011058        $  C
           8016  0.582500        $  O-16
          11023  0.007852        $  Na-23
          12000  0.011146        $  Mg
          13027  0.056542        $  Al-27
          14000  0.180997        $  Si
          16000  0.001403        $  S
          19000  0.017089        $  K
          20000  0.010347        $  Ca
          22000  0.001406        $  Ti
          26000  0.015630        $  Fe
          82000  0.000129        $  Pb
$************************************************************

$************************************************************
$  271 : Rubber, Butyl 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.920000 
$  Total atom density (atoms/b-cm) = 1.185E-01 
$  Composition by atom fraction 
M271       1001  0.666653        $  H-1
           6000  0.333347        $  C
$************************************************************

$************************************************************
$  272 : Rubber, Natural 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C5H8 
$  Molecular weight (g/mole) = 68.11702 
$  Density (g/cm3) = 0.920000 
$  Total atom density (atoms/b-cm) = 1.057E-01 
$  Composition by atom fraction 
M272       1001  0.615370        $  H-1
           6000  0.384630        $  C
$************************************************************

$************************************************************
$  273 : Rubber, Neoprene 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C4H5Cl 
$  Molecular weight (g/mole) = 88.5355 
$  Density (g/cm3) = 1.230000 
$  Total atom density (atoms/b-cm) = 8.366E-02 
$  Composition by atom fraction 
M273       1001  0.499985        $  H-1
           6000  0.400014        $  C
          17000  0.100001        $  Cl
$************************************************************

$************************************************************
$  274 : Rubber, Silicon 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.018500 
$  Total atom density (atoms/b-cm) = 8.227E-02 
$  Composition by atom fraction 
M274       1001  0.597039        $  H-1
           6000  0.199359        $  C
           8016  0.104169        $  O-16
          14000  0.099434        $  Si
$************************************************************

$************************************************************
$  275 : Salt Water (T=0 C) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = H2O:NaCl 
$  Density (g/cm3) = 1.209865 
$  Total atom density (atoms/b-cm) = 9.600E-02 
$  Composition by atom fraction 
M275       1001  0.621161        $  H-1
           8016  0.310581        $  O-16
          11023  0.034129        $  Na-23
          17000  0.034129        $  Cl
$************************************************************

$************************************************************
$  276 : Salt Water (T=20 C) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = H2O:NaCl 
$  Density (g/cm3) = 1.022394 
$  Total atom density (atoms/b-cm) = 9.978E-02 
$  Composition by atom fraction 
M276       1001  0.661906        $  H-1
           8016  0.330953        $  O-16
          11023  0.003571        $  Na-23
          17000  0.003571        $  Cl
$************************************************************

$************************************************************
$  277 : Sand 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.700000 
$  Total atom density (atoms/b-cm) = 5.876E-02 
$  Composition by atom fraction 
M277       1001  0.135405        $  H-1
           6000  0.004874        $  C
           8016  0.583890        $  O-16
          11023  0.012932        $  Na-23
          13027  0.022215        $  Al-27
          14000  0.226483        $  Si
          19000  0.005179        $  K
          20000  0.004874        $  Ca
          26000  0.004146        $  Fe
$************************************************************

$************************************************************
$  278 : Sea Water, Simple Artificial 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.023343 
$  Total atom density (atoms/b-cm) = 9.979E-02 
$  Composition by atom fraction 
M278       1001  0.661590        $  H-1
           8016  0.331493        $  O-16
          11023  0.002897        $  Na-23
          12000  0.000326        $  Mg
          16000  0.000174        $  S
          17000  0.003392        $  Cl
          19000  0.000063        $  K
          20000  0.000064        $  Ca
$************************************************************

$************************************************************
$  279 : Sea Water, Standard 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.023343 
$  Total atom density (atoms/b-cm) = 9.979E-02 
$  Composition by atom fraction 
M279       1001  0.661599        $  H-1
           5000  0.000003        $  B
           8016  0.331497        $  O-16
           9019  0.000000        $  F-19
          11023  0.002897        $  Na-23
          12000  0.000326        $  Mg
          16000  0.000174        $  S
          17000  0.003371        $  Cl
          19000  0.000063        $  K
          20000  0.000064        $  Ca
          35000  0.000005        $  Br
          38000  0.000001        $  Sr
$************************************************************

$************************************************************
$  280 : Sepiolite 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Mg4Si6O15(OH)2-6(H2O) 
$  Molecular weight (g/mole) = 647.83036 
$  Density (g/cm3) = 2.140000 
$  Total atom density (atoms/b-cm) = 9.350E-02 
$  Composition by atom fraction 
M280       1001  0.297872        $  H-1
           8016  0.489362        $  O-16
          12000  0.085106        $  Mg
          14000  0.127660        $  Si
$************************************************************

$************************************************************
$  281 : Silicon 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Si 
$  Molecular weight (g/mole) = 28.0855 
$  Density (g/cm3) = 2.330000 
$  Total atom density (atoms/b-cm) = 4.996E-02 
$  Composition by atom fraction 
M281      14000  1.000000        $  Si
$************************************************************

$************************************************************
$  282 : Silicon Carbide (hexagonal) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = SiC 
$  Molecular weight (g/mole) = 40.0962 
$  Density (g/cm3) = 3.210000 
$  Total atom density (atoms/b-cm) = 9.642E-02 
$  Composition by atom fraction 
M282       6000  0.500000        $  C
          14000  0.500000        $  Si
$************************************************************

$************************************************************
$  283 : Silicon Dioxide (Alpha-quartz) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = SiO2 
$  Molecular weight (g/mole) = 60.0843 
$  Density (g/cm3) = 2.648000 
$  Total atom density (atoms/b-cm) = 7.962E-02 
$  Composition by atom fraction 
M283       8016  0.666667        $  O-16
          14000  0.333333        $  Si
$************************************************************

$************************************************************
$  284 : Silicon Dioxide (Silica) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = SiO2 
$  Molecular weight (g/mole) = 60.0843 
$  Density (g/cm3) = 2.320000 
$  Total atom density (atoms/b-cm) = 6.976E-02 
$  Composition by atom fraction 
M284       8016  0.666667        $  O-16
          14000  0.333333        $  Si
$************************************************************

$************************************************************
$  285 : Silver 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Ag 
$  Molecular weight (g/mole) = 107.8682 
$  Density (g/cm3) = 10.500000 
$  Total atom density (atoms/b-cm) = 5.862E-02 
$  Composition by atom fraction 
M285      47000  1.000000        $  Ag
$************************************************************

$************************************************************
$  286 : Skin (ICRP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.100000 
$  Total atom density (atoms/b-cm) = 1.066E-01 
$  Composition by atom fraction 
M286       1001  0.619966        $  H-1
           6000  0.118059        $  C
           7014  0.020589        $  N-14
           8016  0.240350        $  O-16
          11023  0.000019        $  Na-23
          12000  0.000015        $  Mg
          15031  0.000066        $  P-31
          16000  0.000308        $  S
          17000  0.000468        $  Cl
          19000  0.000135        $  K
          20000  0.000023        $  Ca
          26000  0.000001        $  Fe
          30000  0.000001        $  Zn
$************************************************************

$************************************************************
$  287 : Sodium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Na 
$  Molecular weight (g/mole) = 22.98977 
$  Density (g/cm3) = 0.971000 
$  Total atom density (atoms/b-cm) = 2.544E-02 
$  Composition by atom fraction 
M287      11023  1.000000        $  Na-23
$************************************************************

$************************************************************
$  288 : Sodium Bismuth Tungstate (NBWO) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = NaBi(WO4)2 
$  Molecular weight (g/mole) = 727.64535 
$  Density (g/cm3) = 7.570000 
$  Total atom density (atoms/b-cm) = 7.518E-02 
$  Composition by atom fraction 
M288       8016  0.666667        $  O-16
          11023  0.083333        $  Na-23
          74000  0.166667        $  W
          83209  0.083333        $  Bi-209
$************************************************************

$************************************************************
$  289 : Sodium Chloride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = NaCl 
$  Molecular weight (g/mole) = 58.44277 
$  Density (g/cm3) = 2.170000 
$  Total atom density (atoms/b-cm) = 4.472E-02 
$  Composition by atom fraction 
M289      11023  0.500000        $  Na-23
          17000  0.500000        $  Cl
$************************************************************

$************************************************************
$  290 : Sodium Iodide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = NaI 
$  Molecular weight (g/mole) = 149.89424 
$  Density (g/cm3) = 3.667000 
$  Total atom density (atoms/b-cm) = 2.947E-02 
$  Composition by atom fraction 
M290      11023  0.499999        $  Na-23
          53127  0.500001        $  I-127
$************************************************************

$************************************************************
$  291 : Sodium Nitrate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = NaNO3 
$  Molecular weight (g/mole) = 84.99467 
$  Density (g/cm3) = 2.261000 
$  Total atom density (atoms/b-cm) = 8.010E-02 
$  Composition by atom fraction 
M291       7014  0.200000        $  N-14
           8016  0.600000        $  O-16
          11023  0.200000        $  Na-23
$************************************************************

$************************************************************
$  292 : Sodium Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Na2O 
$  Molecular weight (g/mole) = 61.97894 
$  Density (g/cm3) = 2.270000 
$  Total atom density (atoms/b-cm) = 6.617E-02 
$  Composition by atom fraction 
M292       8016  0.333333        $  O-16
          11023  0.666667        $  Na-23
$************************************************************

$************************************************************
$  293 : Steel, Boron Stainless 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.870000 
$  Total atom density (atoms/b-cm) = 8.978E-02 
$  Composition by atom fraction 
M293       5000  0.048827        $  B
           6000  0.001740        $  C
          14000  0.009304        $  Si
          15031  0.000388        $  P-31
          16000  0.000244        $  S
          24000  0.190960        $  Cr
          25055  0.009512        $  Mn-55
          26000  0.656666        $  Fe
          28000  0.082359        $  Ni
$************************************************************

$************************************************************
$  294 : Steel, Carbon 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.820000 
$  Total atom density (atoms/b-cm) = 8.587E-02 
$  Composition by atom fraction 
M294       6000  0.022831        $  C
          26000  0.977169        $  Fe
$************************************************************

$************************************************************
$  295 : Steel, HT9 Stainless 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.874000 
$  Total atom density (atoms/b-cm) = 8.598E-02 
$  Composition by atom fraction 
M295       6000  0.009183        $  C
          14000  0.007854        $  Si
          15031  0.000534        $  P-31
          16000  0.000344        $  S
          23000  0.003248        $  V
          24000  0.121971        $  Cr
          25055  0.006023        $  Mn-55
          26000  0.838897        $  Fe
          28000  0.004698        $  Ni
          42000  0.005748        $  Mo
          74000  0.001500        $  W
$************************************************************

$************************************************************
$  296 : Steel, Stainless 202 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.860000 
$  Total atom density (atoms/b-cm) = 8.680E-02 
$  Composition by atom fraction 
M296       6000  0.003405        $  C
           7014  0.004866        $  N-14
          14000  0.009708        $  Si
          15031  0.000528        $  P-31
          16000  0.000255        $  S
          24000  0.188773        $  Cr
          25055  0.086851        $  Mn-55
          26000  0.659160        $  Fe
          28000  0.046454        $  Ni
$************************************************************

$************************************************************
$  297 : Steel, Stainless 302 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.860000 
$  Total atom density (atoms/b-cm) = 8.680E-02 
$  Composition by atom fraction 
M297       6000  0.006356        $  C
          14000  0.018057        $  Si
          15031  0.000739        $  P-31
          16000  0.000476        $  S
          24000  0.188773        $  Cr
          25055  0.018462        $  Mn-55
          26000  0.683520        $  Fe
          28000  0.083616        $  Ni
$************************************************************

$************************************************************
$  298 : Steel, Stainless 304 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.000000 
$  Total atom density (atoms/b-cm) = 8.769E-02 
$  Composition by atom fraction 
M298       6000  0.001830        $  C
          14000  0.009781        $  Si
          15031  0.000408        $  P-31
          16000  0.000257        $  S
          24000  0.200762        $  Cr
          25055  0.010001        $  Mn-55
          26000  0.690375        $  Fe
          28000  0.086587        $  Ni
$************************************************************

$************************************************************
$  299 : Steel, Stainless 304L 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.000000 
$  Total atom density (atoms/b-cm) = 8.758E-02 
$  Composition by atom fraction 
M299       6000  0.000687        $  C
          14000  0.009793        $  Si
          15031  0.000408        $  P-31
          16000  0.000257        $  S
          24000  0.201015        $  Cr
          25055  0.010013        $  Mn-55
          26000  0.684101        $  Fe
          28000  0.093725        $  Ni
$************************************************************

$************************************************************
$  300 : Steel, Stainless 316 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.000000 
$  Total atom density (atoms/b-cm) = 8.655E-02 
$  Composition by atom fraction 
M300       6000  0.001900        $  C
          14000  0.010048        $  Si
          15031  0.000413        $  P-31
          16000  0.000260        $  S
          24000  0.181986        $  Cr
          25055  0.010274        $  Mn-55
          26000  0.666811        $  Fe
          28000  0.113803        $  Ni
          42000  0.014504        $  Mo
$************************************************************

$************************************************************
$  301 : Steel, Stainless 316L 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.000000 
$  Total atom density (atoms/b-cm) = 8.698E-02 
$  Composition by atom fraction 
M301       6000  0.001384        $  C
          14000  0.019722        $  Si
          15031  0.000805        $  P-31
          16000  0.000518        $  S
          24000  0.181098        $  Cr
          25055  0.020165        $  Mn-55
          26000  0.648628        $  Fe
          28000  0.113247        $  Ni
          42000  0.014434        $  Mo
$************************************************************

$************************************************************
$  302 : Steel, Stainless 321 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.000000 
$  Total atom density (atoms/b-cm) = 8.816E-02 
$  Composition by atom fraction 
M302       6000  0.003640        $  C
          14000  0.019457        $  Si
          15031  0.000794        $  P-31
          16000  0.000511        $  S
          22000  0.001712        $  Ti
          24000  0.189171        $  Cr
          25055  0.019893        $  Mn-55
          26000  0.662408        $  Fe
          28000  0.102413        $  Ni
$************************************************************

$************************************************************
$  303 : Steel, Stainless 347 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 8.000000 
$  Total atom density (atoms/b-cm) = 8.770E-02 
$  Composition by atom fraction 
M303       6000  0.003659        $  C
          14000  0.019559        $  Si
          15031  0.000798        $  P-31
          16000  0.000514        $  S
          24000  0.179602        $  Cr
          25055  0.019998        $  Mn-55
          26000  0.669338        $  Fe
          28000  0.102952        $  Ni
          41093  0.002365        $  Nb-93
          73181  0.001214        $  Ta-181
$************************************************************

$************************************************************
$  304 : Steel, Stainless 409 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.800000 
$  Total atom density (atoms/b-cm) = 8.604E-02 
$  Composition by atom fraction 
M304       6000  0.003591        $  C
          14000  0.019108        $  Si
          15031  0.000776        $  P-31
          16000  0.000749        $  S
          22000  0.008406        $  Ti
          24000  0.116862        $  Cr
          25055  0.009769        $  Mn-55
          26000  0.840740        $  Fe
$************************************************************

$************************************************************
$  305 : Steel, Stainless 440 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 7.800000 
$  Total atom density (atoms/b-cm) = 8.682E-02 
$  Composition by atom fraction 
M305       6000  0.030406        $  C
          14000  0.012521        $  Si
          15031  0.000454        $  P-31
          16000  0.000337        $  S
          24000  0.176887        $  Cr
          25055  0.006401        $  Mn-55
          26000  0.770242        $  Fe
          42000  0.002752        $  Mo
$************************************************************

$************************************************************
$  306 : Sterotex 
$  Source = PNNL-15870 Rev. 1 
$  Formula = (C17H35CO2)3-C3H5 
$  Molecular weight (g/mole) = 891.4797 
$  Density (g/cm3) = 0.862000 
$  Total atom density (atoms/b-cm) = 1.007E-01 
$  Composition by atom fraction 
M306       1001  0.635838        $  H-1
           6000  0.329480        $  C
           8016  0.034682        $  O-16
$************************************************************

$************************************************************
$  307 : Stilbene (trans-stilbene isomer) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C14H10 
$  Molecular weight (g/mole) = 178.2292 
$  Density (g/cm3) = 1.220000 
$  Total atom density (atoms/b-cm) = 9.893E-02 
$  Composition by atom fraction 
M307       1001  0.416667        $  H-1
           6000  0.583333        $  C
$************************************************************

$************************************************************
$  308 : Sulphur 
$  Source = PNNL-15870 Rev. 1 
$  Formula = S 
$  Molecular weight (g/mole) = 32.065 
$  Density (g/cm3) = 2.000000 
$  Total atom density (atoms/b-cm) = 3.756E-02 
$  Composition by atom fraction 
M308      16000  1.000000        $  S
$************************************************************

$************************************************************
$  309 : Tantalum 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Ta 
$  Molecular weight (g/mole) = 180.9479 
$  Density (g/cm3) = 16.654000 
$  Total atom density (atoms/b-cm) = 5.543E-02 
$  Composition by atom fraction 
M309      73181  1.000000        $  Ta-181
$************************************************************

$************************************************************
$  310 : Thorium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Th 
$  Molecular weight (g/mole) = 232.0381 
$  Density (g/cm3) = 11.720000 
$  Total atom density (atoms/b-cm) = 3.042E-02 
$  Composition by atom fraction 
M310      90232  1.000000        $  Th-232
$************************************************************

$************************************************************
$  311 : Thorium Dioxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = ThO2 
$  Molecular weight (g/mole) = 264.0369 
$  Density (g/cm3) = 10.000000 
$  Total atom density (atoms/b-cm) = 6.842E-02 
$  Composition by atom fraction 
M311       8016  0.666667        $  O-16
          90232  0.333333        $  Th-232
$************************************************************

$************************************************************
$  312 : Tin 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Sn 
$  Molecular weight (g/mole) = 118.71 
$  Density (g/cm3) = 7.310000 
$  Total atom density (atoms/b-cm) = 3.708E-02 
$  Composition by atom fraction 
M312      50000  1.000000        $  Sn
$************************************************************

$************************************************************
$  313 : Tissue Equivalent, MS20 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.000000 
$  Total atom density (atoms/b-cm) = 8.879E-02 
$  Composition by atom fraction 
M313       1001  0.546359        $  H-1
           6000  0.329480        $  C
           7014  0.008619        $  N-14
           8016  0.079013        $  O-16
          12000  0.036358        $  Mg
          17000  0.000172        $  Cl
$************************************************************

$************************************************************
$  314 : Tissue Equivalent-Gas, methane based  (TEG: MB) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.001064 
$  Total atom density (atoms/b-cm) = 1.070E-04 
$  Composition by atom fraction 
M314       1001  0.605249        $  H-1
           6000  0.227454        $  C
           7014  0.015038        $  N-14
           8016  0.152259        $  O-16
$************************************************************

$************************************************************
$  315 : Tissue Equivalent-Gas, propane based  (TEG: PB) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.001826 
$  Total atom density (atoms/b-cm) = 1.870E-04 
$  Composition by atom fraction 
M315       1001  0.598952        $  H-1
           6000  0.278531        $  C
           7014  0.014702        $  N-14
           8016  0.107815        $  O-16
$************************************************************

$************************************************************
$  316 : Tissue, Adipose (ICRP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.920000 
$  Total atom density (atoms/b-cm) = 1.035E-01 
$  Composition by atom fraction 
M316       1001  0.634643        $  H-1
           6000  0.284063        $  C
           7014  0.003047        $  N-14
           8016  0.077748        $  O-16
          11023  0.000116        $  Na-23
          12000  0.000004        $  Mg
          15031  0.000028        $  P-31
          16000  0.000122        $  S
          17000  0.000180        $  Cl
          19000  0.000044        $  K
          20000  0.000003        $  Ca
          26000  0.000002        $  Fe
          30000  0.000002        $  Zn
$************************************************************

$************************************************************
$  317 : Tissue, Breast 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.020000 
$  Total atom density (atoms/b-cm) = 1.032E-01 
$  Composition by atom fraction 
M317       1001  0.625781        $  H-1
           6000  0.164483        $  C
           7014  0.012745        $  N-14
           8016  0.196001        $  O-16
          11023  0.000259        $  Na-23
          15031  0.000192        $  P-31
          16000  0.000371        $  S
          17000  0.000168        $  Cl
$************************************************************

$************************************************************
$  318 : Tissue, Lung (ICRP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.050000 
$  Total atom density (atoms/b-cm) = 1.004E-01 
$  Composition by atom fraction 
M318       1001  0.633136        $  H-1
           6000  0.053674        $  C
           7014  0.012889        $  N-14
           8016  0.298160        $  O-16
          11023  0.000504        $  Na-23
          12000  0.000189        $  Mg
          15031  0.000163        $  P-31
          16000  0.000442        $  S
          17000  0.000473        $  Cl
          19000  0.000313        $  K
          20000  0.000014        $  Ca
          26000  0.000042        $  Fe
          30000  0.000001        $  Zn
$************************************************************

$************************************************************
$  319 : Tissue, Ovary 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.050000 
$  Total atom density (atoms/b-cm) = 1.024E-01 
$  Composition by atom fraction 
M319       1001  0.643230        $  H-1
           6000  0.047811        $  C
           7014  0.010580        $  N-14
           8016  0.296394        $  O-16
          11023  0.000537        $  Na-23
          15031  0.000399        $  P-31
          16000  0.000385        $  S
          17000  0.000348        $  Cl
          19000  0.000316        $  K
$************************************************************

$************************************************************
$  320 : Tissue, Soft (ICRP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.000000 
$  Total atom density (atoms/b-cm) = 9.901E-02 
$  Composition by atom fraction 
M320       1001  0.630454        $  H-1
           6000  0.117588        $  C
           7014  0.010804        $  N-14
           8016  0.239601        $  O-16
          11023  0.000299        $  Na-23
          12000  0.000033        $  Mg
          15031  0.000261        $  P-31
          16000  0.000377        $  S
          17000  0.000230        $  Cl
          19000  0.000310        $  K
          20000  0.000035        $  Ca
          26000  0.000005        $  Fe
          30000  0.000003        $  Zn
$************************************************************

$************************************************************
$  321 : Tissue, Soft (ICRU four component) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.000000 
$  Total atom density (atoms/b-cm) = 9.581E-02 
$  Composition by atom fraction 
M321       1001  0.630936        $  H-1
           6000  0.058092        $  C
           7014  0.011668        $  N-14
           8016  0.299304        $  O-16
$************************************************************

$************************************************************
$  322 : Tissue, Testes (ICRP) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.040000 
$  Total atom density (atoms/b-cm) = 1.009E-01 
$  Composition by atom fraction 
M322       1001  0.641360        $  H-1
           6000  0.047676        $  C
           7014  0.008835        $  N-14
           8016  0.300181        $  O-16
          11023  0.000610        $  Na-23
          12000  0.000028        $  Mg
          15031  0.000250        $  P-31
          16000  0.000283        $  S
          17000  0.000427        $  Cl
          19000  0.000330        $  K
          20000  0.000015        $  Ca
          26000  0.000002        $  Fe
          30000  0.000002        $  Zn
$************************************************************

$************************************************************
$  323 : Tissue, Testis (ICRU) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.040000 
$  Total atom density (atoms/b-cm) = 1.021E-01 
$  Composition by atom fraction 
M323       1001  0.645178        $  H-1
           6000  0.050568        $  C
           7014  0.008760        $  N-14
           8016  0.293720        $  O-16
          11023  0.000534        $  Na-23
          15031  0.000198        $  P-31
          16000  0.000383        $  S
          17000  0.000346        $  Cl
          19000  0.000314        $  K
$************************************************************

$************************************************************
$  324 : Titanium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Ti 
$  Molecular weight (g/mole) = 47.867 
$  Density (g/cm3) = 4.540000 
$  Total atom density (atoms/b-cm) = 5.712E-02 
$  Composition by atom fraction 
M324      22000  1.000000        $  Ti
$************************************************************

$************************************************************
$  325 : Titanium alloy, grade 5 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 4.430000 
$  Total atom density (atoms/b-cm) = 5.878E-02 
$  Composition by atom fraction 
M325       1001  0.004953        $  H-1
           6000  0.002154        $  C
           7014  0.000680        $  N-14
           8016  0.004000        $  O-16
          13027  0.103023        $  Al-27
          22000  0.847256        $  Ti
          23000  0.035635        $  V
          26000  0.002300        $  Fe
$************************************************************

$************************************************************
$  326 : Titanium Dioxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = TiO2 
$  Molecular weight (g/mole) = 79.8658 
$  Density (g/cm3) = 4.260000 
$  Total atom density (atoms/b-cm) = 9.636E-02 
$  Composition by atom fraction 
M326       8016  0.666606        $  O-16
          22000  0.333394        $  Ti
$************************************************************

$************************************************************
$  327 : Titanium Hydride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = TiH2 
$  Molecular weight (g/mole) = 49.88288 
$  Density (g/cm3) = 3.750000 
$  Total atom density (atoms/b-cm) = 1.358E-01 
$  Composition by atom fraction 
M327       1001  0.666667        $  H-1
          22000  0.333333        $  Ti
$************************************************************

$************************************************************
$  328 : Toluene 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C7H8 
$  Molecular weight (g/mole) = 92.13842 
$  Density (g/cm3) = 0.866900 
$  Total atom density (atoms/b-cm) = 8.499E-02 
$  Composition by atom fraction 
M328       1001  0.533317        $  H-1
           6000  0.466683        $  C
$************************************************************

$************************************************************
$  329 : Tributyl Borate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = B(OC4H9)3 
$  Molecular weight (g/mole) = 230.15198 
$  Density (g/cm3) = 0.864000 
$  Total atom density (atoms/b-cm) = 9.721E-02 
$  Composition by atom fraction 
M329       1001  0.627907        $  H-1
           5000  0.023256        $  B
           6000  0.279070        $  C
           8016  0.069767        $  O-16
$************************************************************

$************************************************************
$  330 : Tributyl Phosphate (TBP) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = (C4H9)3PO4 
$  Molecular weight (g/mole) = 266.314141 
$  Density (g/cm3) = 0.972400 
$  Total atom density (atoms/b-cm) = 9.675E-02 
$  Composition by atom fraction 
M330       1001  0.613636        $  H-1
           6000  0.272727        $  C
           8016  0.090909        $  O-16
          15031  0.022727        $  P-31
$************************************************************

$************************************************************
$  331 : Tungsten 
$  Source = PNNL-15870 Rev. 1 
$  Formula = W 
$  Molecular weight (g/mole) = 183.84 
$  Density (g/cm3) = 19.300000 
$  Total atom density (atoms/b-cm) = 6.322E-02 
$  Composition by atom fraction 
M331      74000  1.000000        $  W
$************************************************************

$************************************************************
$  332 : Uranium Carbide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UC 
$  Molecular weight (g/mole) = 249.9687908998 
$  Density (g/cm3) = 13.630000 
$  Total atom density (atoms/b-cm) = 6.567E-02 
$  Composition by atom fraction 
M332       6000  0.500000        $  C
          92234  0.000136        $  U-234
          92235  0.015186        $  U-235
          92236  0.000070        $  U-236
          92238  0.484609        $  U-238
$************************************************************

$************************************************************
$  333 : Uranium Dicarbide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UC2 
$  Molecular weight (g/mole) = 261.9794908998 
$  Density (g/cm3) = 11.280000 
$  Total atom density (atoms/b-cm) = 7.779E-02 
$  Composition by atom fraction 
M333       6000  0.666667        $  C
          92234  0.000090        $  U-234
          92235  0.010124        $  U-235
          92236  0.000046        $  U-236
          92238  0.323072        $  U-238
$************************************************************

$************************************************************
$  334 : Uranium Dioxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UO2 
$  Molecular weight (g/mole) = 269.9568908998 
$  Density (g/cm3) = 10.960000 
$  Total atom density (atoms/b-cm) = 7.335E-02 
$  Composition by atom fraction 
M334       8016  0.666667        $  O-16
          92234  0.000090        $  U-234
          92235  0.010124        $  U-235
          92236  0.000046        $  U-236
          92238  0.323072        $  U-238
$************************************************************

$************************************************************
$  335 : Uranium Hexafluoride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UF6 
$  Molecular weight (g/mole) = 351.9485100998 
$  Density (g/cm3) = 4.680000 
$  Total atom density (atoms/b-cm) = 5.606E-02 
$  Composition by atom fraction 
M335       9019  0.857143        $  F-19
          92234  0.000039        $  U-234
          92235  0.004339        $  U-235
          92236  0.000020        $  U-236
          92238  0.138460        $  U-238
$************************************************************

$************************************************************
$  336 : Uranium Hydride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UH3 
$  Molecular weight (g/mole) = 240.9819108998 
$  Density (g/cm3) = 11.100000 
$  Total atom density (atoms/b-cm) = 1.110E-01 
$  Composition by atom fraction 
M336       1001  0.750000        $  H-1
          92234  0.000068        $  U-234
          92235  0.007593        $  U-235
          92236  0.000035        $  U-236
          92238  0.242304        $  U-238
$************************************************************

$************************************************************
$  337 : Uranium Nitride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UN 
$  Molecular weight (g/mole) = 251.9647908998 
$  Density (g/cm3) = 14.310000 
$  Total atom density (atoms/b-cm) = 6.840E-02 
$  Composition by atom fraction 
M337       7014  0.500000        $  N-14
          92234  0.000136        $  U-234
          92235  0.015186        $  U-235
          92236  0.000070        $  U-236
          92238  0.484609        $  U-238
$************************************************************

$************************************************************
$  338 : Uranium Oxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = U3O8 
$  Molecular weight (g/mole) = 841.8694726993 
$  Density (g/cm3) = 8.300000 
$  Total atom density (atoms/b-cm) = 6.531E-02 
$  Composition by atom fraction 
M338       8016  0.727273        $  O-16
          92234  0.000074        $  U-234
          92235  0.008283        $  U-235
          92236  0.000038        $  U-236
          92238  0.264332        $  U-238
$************************************************************

$************************************************************
$  339 : Uranium Tetrafluoride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UF4 
$  Molecular weight (g/mole) = 313.9517036998 
$  Density (g/cm3) = 6.700000 
$  Total atom density (atoms/b-cm) = 6.426E-02 
$  Composition by atom fraction 
M339       9019  0.800000        $  F-19
          92234  0.000054        $  U-234
          92235  0.006074        $  U-235
          92236  0.000028        $  U-236
          92238  0.193843        $  U-238
$************************************************************

$************************************************************
$  340 : Uranium Trioxide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UO3 
$  Molecular weight (g/mole) = 285.9562908998 
$  Density (g/cm3) = 7.290000 
$  Total atom density (atoms/b-cm) = 6.141E-02 
$  Composition by atom fraction 
M340       8016  0.750000        $  O-16
          92234  0.000068        $  U-234
          92235  0.007593        $  U-235
          92236  0.000035        $  U-236
          92238  0.242304        $  U-238
$************************************************************

$************************************************************
$  341 : Uranium, Depleted, Typical 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 18.951157 
$  Total atom density (atoms/b-cm) = 4.794E-02 
$  Composition by atom fraction 
M341      92234  0.000005        $  U-234
          92235  0.002532        $  U-235
          92238  0.997463        $  U-238
$************************************************************

$************************************************************
$  342 : Uranium, Enriched, Typical Commercial 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 18.944492 
$  Total atom density (atoms/b-cm) = 4.794E-02 
$  Composition by atom fraction 
M342      92234  0.000310        $  U-234
          92235  0.029967        $  U-235
          92238  0.969723        $  U-238
$************************************************************

$************************************************************
$  343 : Uranium, HEU, Health Physics Society 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 18.724868 
$  Total atom density (atoms/b-cm) = 4.794E-02 
$  Composition by atom fraction 
M343      92234  0.010582        $  U-234
          92235  0.932362        $  U-235
          92236  0.002053        $  U-236
          92238  0.055003        $  U-238
$************************************************************

$************************************************************
$  344 : Uranium, HEU, Russian Average 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 18.732854 
$  Total atom density (atoms/b-cm) = 4.794E-02 
$  Composition by atom fraction 
M344      92234  0.009722        $  U-234
          92235  0.898982        $  U-235
          92236  0.003798        $  U-236
          92238  0.087498        $  U-238
$************************************************************

$************************************************************
$  345 : Uranium, HEU, US Average 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 18.724760 
$  Total atom density (atoms/b-cm) = 4.794E-02 
$  Composition by atom fraction 
M345      92234  0.009849        $  U-234
          92235  0.932166        $  U-235
          92236  0.004484        $  U-236
          92238  0.053501        $  U-238
$************************************************************

$************************************************************
$  346 : Uranium, Low Enriched (LEU) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = U 
$  Density (g/cm3) = 18.944386 
$  Total atom density (atoms/b-cm) = 4.794E-02 
$  Composition by atom fraction 
M346      92234  0.000271        $  U-234
          92235  0.030372        $  U-235
          92236  0.000139        $  U-236
          92238  0.969217        $  U-238
$************************************************************

$************************************************************
$  347 : Uranium, Natural (NU) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 18.950000 
$  Total atom density (atoms/b-cm) = 4.794E-02 
$  Composition by atom fraction 
M347      92234  0.000058        $  U-234
          92235  0.007295        $  U-235
          92238  0.992647        $  U-238
$************************************************************

$************************************************************
$  348 : Uranium-Plutonium, Mixed Oxide (MOX) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 11.000000 
$  Total atom density (atoms/b-cm) = 7.357E-02 
$  Composition by atom fraction 
M348       8016  0.666666        $  O-16
          92234  0.000004        $  U-234
          92235  0.000805        $  U-235
          92236  0.000000        $  U-236
          92238  0.317052        $  U-238
          94238  0.000390        $  Pu-238
          94239  0.008487        $  Pu-239
          94240  0.004032        $  Pu-240
          94241  0.001462        $  Pu-241
          94242  0.001103        $  Pu-242
$************************************************************

$************************************************************
$  349 : Uranyl Fluoride 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UO2F2 
$  Molecular weight (g/mole) = 307.9536972998 
$  Density (g/cm3) = 6.370000 
$  Total atom density (atoms/b-cm) = 6.228E-02 
$  Composition by atom fraction 
M349       8016  0.400000        $  O-16
           9019  0.400000        $  F-19
          92234  0.000054        $  U-234
          92235  0.006074        $  U-235
          92236  0.000028        $  U-236
          92238  0.193843        $  U-238
$************************************************************

$************************************************************
$  350 : Uranyl Nitrate 
$  Source = PNNL-15870 Rev. 1 
$  Formula = UO2(NO3)2 
$  Molecular weight (g/mole) = 393.9666908998 
$  Density (g/cm3) = 2.203000 
$  Total atom density (atoms/b-cm) = 3.704E-02 
$  Composition by atom fraction 
M350       7014  0.181818        $  N-14
           8016  0.727273        $  O-16
          92234  0.000025        $  U-234
          92235  0.002761        $  U-235
          92236  0.000013        $  U-236
          92238  0.088111        $  U-238
$************************************************************

$************************************************************
$  351 : Vermiculite, Exfoliated 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.085000 
$  Total atom density (atoms/b-cm) = 3.048E-03 
$  Composition by atom fraction 
M351       1001  0.197175        $  H-1
           8016  0.520978        $  O-16
          12000  0.092159        $  Mg
          13027  0.039305        $  Al-27
          14000  0.113407        $  Si
          19000  0.009307        $  K
          20000  0.006852        $  Ca
          22000  0.003457        $  Ti
          26000  0.017361        $  Fe
$************************************************************

$************************************************************
$  352 : Viton Fluoroelastomer 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.800000 
$  Total atom density (atoms/b-cm) = 7.596E-02 
$  Composition by atom fraction 
M352       1001  0.133327        $  H-1
           6000  0.333341        $  C
           9019  0.533332        $  F-19
$************************************************************

$************************************************************
$  353 : Water, Heavy 
$  Source = PNNL-15870 Rev. 1 
$  Formula = D2O 
$  Molecular weight (g/mole) = 20.027603556 
$  Density (g/cm3) = 1.105340 
$  Total atom density (atoms/b-cm) = 9.971E-02 
$  Composition by atom fraction 
M353       1002  0.666667        $  H-2
           8016  0.333333        $  O-16
$************************************************************

$************************************************************
$  354 : Water, Liquid 
$  Source = PNNL-15870 Rev. 1 
$  Formula = H2O 
$  Molecular weight (g/mole) = 18.01528 
$  Density (g/cm3) = 0.998207 
$  Total atom density (atoms/b-cm) = 1.001E-01 
$  Composition by atom fraction 
M354       1001  0.666657        $  H-1
           8016  0.333343        $  O-16
$************************************************************

$************************************************************
$  355 : Water, Vapor 
$  Source = PNNL-15870 Rev. 1 
$  Formula = H2O 
$  Molecular weight (g/mole) = 18.01528 
$  Density (g/cm3) = 0.000756 
$  Total atom density (atoms/b-cm) = 7.583E-05 
$  Composition by atom fraction 
M355       1001  0.666657        $  H-1
           8016  0.333343        $  O-16
$************************************************************

$************************************************************
$  356 : Wax, M3 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 1.050000 
$  Total atom density (atoms/b-cm) = 1.134E-01 
$  Composition by atom fraction 
M356       1001  0.632204        $  H-1
           6000  0.304366        $  C
           8016  0.032116        $  O-16
          12000  0.030913        $  Mg
          20000  0.000401        $  Ca
$************************************************************

$************************************************************
$  357 : Wax, Mix D 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.990000 
$  Total atom density (atoms/b-cm) = 1.203E-01 
$  Composition by atom fraction 
M357       1001  0.658880        $  H-1
           6000  0.320919        $  C
           8016  0.010845        $  O-16
          12000  0.007867        $  Mg
          22000  0.001489        $  Ti
$************************************************************

$************************************************************
$  358 : Wax, Paraffin 
$  Source = PNNL-15870 Rev. 1 
$  Formula = C25H52 
$  Molecular weight (g/mole) = 352.68038 
$  Density (g/cm3) = 0.930000 
$  Total atom density (atoms/b-cm) = 1.223E-01 
$  Composition by atom fraction 
M358       1001  0.675311        $  H-1
           6000  0.324689        $  C
$************************************************************

$************************************************************
$  359 : Wood (Southern Pine) 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 0.640000 
$  Total atom density (atoms/b-cm) = 4.932E-02 
$  Composition by atom fraction 
M359       1001  0.462423        $  H-1
           6000  0.323389        $  C
           7014  0.002773        $  N-14
           8016  0.208779        $  O-16
          12000  0.000639        $  Mg
          16000  0.001211        $  S
          19000  0.000397        $  K
          20000  0.000388        $  Ca
$************************************************************

$************************************************************
$  360 : Xenon 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Xe 
$  Molecular weight (g/mole) = 131.293 
$  Density (g/cm3) = 0.005485 
$  Total atom density (atoms/b-cm) = 2.516E-05 
$  Composition by atom fraction 
M360      54000  1.000000        $  Xe
$************************************************************

$************************************************************
$  361 : Yttrium Aluminum Garnet (YAG) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Y3Al5O12 
$  Molecular weight (g/mole) = 593.61804 
$  Density (g/cm3) = 4.560000 
$  Total atom density (atoms/b-cm) = 9.252E-02 
$  Composition by atom fraction 
M361       8016  0.600000        $  O-16
          13027  0.250000        $  Al-27
          39089  0.150000        $  Y-89
$************************************************************

$************************************************************
$  362 : Yttrium Aluminum Perovskite (YAP) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = YAlO3 
$  Molecular weight (g/mole) = 163.885588 
$  Density (g/cm3) = 5.370000 
$  Total atom density (atoms/b-cm) = 9.866E-02 
$  Composition by atom fraction 
M362       8016  0.600000        $  O-16
          13027  0.200000        $  Al-27
          39089  0.200000        $  Y-89
$************************************************************

$************************************************************
$  363 : Yttrium OxyorthoSilicate (YSO) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Y2SiO5 
$  Molecular weight (g/mole) = 285.8942 
$  Density (g/cm3) = 4.450000 
$  Total atom density (atoms/b-cm) = 7.499E-02 
$  Composition by atom fraction 
M363       8016  0.625000        $  O-16
          14000  0.125000        $  Si
          39089  0.250000        $  Y-89
$************************************************************

$************************************************************
$  364 : Zeolite (Natrolite) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = NA2Al2Si3O10-2(H2O) 
$  Molecular weight (g/mole) = 380.223676 
$  Density (g/cm3) = 2.250000 
$  Total atom density (atoms/b-cm) = 8.196E-02 
$  Composition by atom fraction 
M364       1001  0.173913        $  H-1
           8016  0.521739        $  O-16
          11023  0.086957        $  Na-23
          13027  0.086957        $  Al-27
          14000  0.130435        $  Si
$************************************************************

$************************************************************
$  365 : Zinc 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Zn 
$  Molecular weight (g/mole) = 65.409 
$  Density (g/cm3) = 7.133000 
$  Total atom density (atoms/b-cm) = 6.567E-02 
$  Composition by atom fraction 
M365      30000  1.000000        $  Zn
$************************************************************

$************************************************************
$  366 : Zinc Selenide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = ZnSe 
$  Molecular weight (g/mole) = 144.369 
$  Density (g/cm3) = 5.420000 
$  Total atom density (atoms/b-cm) = 4.522E-02 
$  Composition by atom fraction 
M366      30000  0.500000        $  Zn
          34000  0.500000        $  Se
$************************************************************

$************************************************************
$  367 : Zinc Sulfide 
$  Source = PNNL-15870 Rev. 1 
$  Formula = ZnS 
$  Molecular weight (g/mole) = 97.474 
$  Density (g/cm3) = 4.090000 
$  Total atom density (atoms/b-cm) = 5.054E-02 
$  Composition by atom fraction 
M367      16000  0.500000        $  S
          30000  0.500000        $  Zn
$************************************************************

$************************************************************
$  368 : Zircaloy-2 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 6.560000 
$  Total atom density (atoms/b-cm) = 4.348E-02 
$  Composition by atom fraction 
M368       8016  0.006796        $  O-16
          24000  0.001743        $  Cr
          26000  0.001623        $  Fe
          28000  0.000772        $  Ni
          40000  0.978381        $  Zr
          50000  0.010686        $  Sn
$************************************************************

$************************************************************
$  369 : Zircaloy-4 
$  Source = PNNL-15870 Rev. 1 
$  Density (g/cm3) = 6.560000 
$  Total atom density (atoms/b-cm) = 4.350E-02 
$  Composition by atom fraction 
M369       8016  0.006790        $  O-16
          24000  0.001741        $  Cr
          26000  0.003242        $  Fe
          40000  0.977549        $  Zr
          50000  0.010677        $  Sn
$************************************************************

$************************************************************
$  370 : Zirconium 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Zr 
$  Molecular weight (g/mole) = 91.224 
$  Density (g/cm3) = 6.506000 
$  Total atom density (atoms/b-cm) = 4.295E-02 
$  Composition by atom fraction 
M370      40000  1.000000        $  Zr
$************************************************************

$************************************************************
$  371 : Zirconium Hydride (Zr5H8) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = Zr5H8 
$  Molecular weight (g/mole) = 464.18352 
$  Density (g/cm3) = 5.610000 
$  Total atom density (atoms/b-cm) = 9.462E-02 
$  Composition by atom fraction 
M371       1001  0.615385        $  H-1
          40000  0.384615        $  Zr
$************************************************************

$************************************************************
$  372 : Zirconium Hydride (ZrH2) 
$  Source = PNNL-15870 Rev. 1 
$  Formula = ZrH2 
$  Molecular weight (g/mole) = 93.23988 
$  Density (g/cm3) = 5.610000 
$  Total atom density (atoms/b-cm) = 1.087E-01 
$  Composition by atom fraction 
M372       1001  0.666667        $  H-1
          40000  0.333333        $  Zr
$************************************************************

$************************************************************
$  373 : Martian Atmosphere 
$  Source = Mahaffy 2013, DOI: 10.1126/science.1237966 
$  Density (g/cm3) = function of altitude and time 
$  Composition by atom fraction 
M373       6000  0.323658        $  C
           7000  0.020021        $  N
           8000  0.649153        $  O
          18000  0.007168        $  Ar
$************************************************************

$************************************************************
$  374 : Martian Regolith 
$  Source = McKenna-Lawlor 2012, DOI: 10.1016/j.icarus.2011.04.004 
$  Density (g/cm3) = 1.7 
$  Total atom density (atoms/b-cm) = 3.2746E-02    
$  Composition by atom fraction 
M374       1000  0.151069        $  H
          11000  0.033300        $  Na
          12000  0.016650        $  Mg
          13000  0.033300        $  Al
          14000  0.156699        $  Si
          18000  0.537612        $  Ar
          19000  0.033300        $  K
          20000  0.016650        $  Ca
          26000  0.021419        $  Fe
$************************************************************
