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Table B.1. Characteristics of Important Radionuclidesa


Nuclides Atomic;
number
Half - lifeb Principle mode(s);
of decay
Major radiation energies d;
(MeV/dis)
"Q" valuee Specific;
activity;
(Ci/g)
Daughter(s)
a e g and X (MeV/dis) (W/Ci)
                     
3H 1 1.233E+01 year b   0.00568   5.68E-03 3.37E-05 9.650E+03 3He
                     
14C 6 5.730E+03 year b   0.0495   4.95E-02 2.93E-04 4.457 14N
                     
26Al 13 7.2E+05 year EC   0.4451 2.6758 3.079 1.825E-02 1.91E-02 26Mg
                     
32Si 14 650 year b   0.0647   2.10E-01 1.245E-03 1.719E+01 32P
                     
32P 15 14.282 days b   0.6947   6.95E-01 4.12E-03 2.853E+05 32S
                     
35S 16 87.51 days b   0.0486   4.86E-02 2.88E-04 4.263E+04 35Cl
                     
36Cl 17 3.01E+05 year b (98.1%);
EC (1.9%)
  0.2460   2.460E-01 1.458E-03 3.299E-02 36Ar;
36S
                     
40K 19 1.277E+09 year b (89.33%):
EC (10.67%)
  0.4545 0.1559 6.104E-01 3.62E-03 6.983E-06 40Ca;
40Ar
                     
45Ca 20 163.8 days b   0.0770   7.70E-02 4.56E-04 1.780E+04 45Sc
                     
46Sc 21 83.83 days b 0.11 2.0095   2.122 1.257E-02 3.381E+04 46Ti
                     
51Cr 24 27.704 days EC   0.0031 0.0325 3.56E-02 2.11E-04 9.240E+04 51V
                     
54Mn 25 312. days EC   0.0034 0.8360 8.394E-01 4.975E-03 7.738E+03 54Cr
                     
55Fe 26 2.73 year EC   0.0038 0.0016 5.4E-03 3.2E-05 2.500E+03 55Mn
59Fe 26 44.496 days b   0.1174 1.1882 1.3056 7.741E-03 4.918E+04 59Co
                     
57Co 27 271.77 days EC   0.0176 0.1252 1.428E-01 8.464E-01 8.456E+03 57Fe
58Co 27 70.92 days EC   0.0336 0.9758 1.0094 5.99E-03 3.181E+04 58Fe
60Co 27 5.271 year b   0.0958 2.5058 2.6016 1.541E-02 1.131E+03 60Ni
60mCo 27 10.47 minutes IT  (99.75%);
b (0.25%)
  0.0536 0.0066 6.02E-02 3.57E-04 2.993E+08 60Co;
60Ni
                     
59Ni 28 7.5E+04 year EC   0.0043 0.0024 6.72E-03 3.98E-05 8.079E-02 59Co
63Ni 28 1.001E+02 year b   0.0171   1.71E-02 1.01E-04 6.168E+01 63Cu
                     
65Zn 30 244.1 days EC   0.0066 0.5838 5.90E-01 3.51E-03 8.237E+03 65Cu
                     
67Ga 31 3.261 days EC   0.0333 0.1549 1.882E-01 1.115E-03 5.975E+05 67Zn
                     
75Se 34 119.77 days EC   0.0134 0.3924 4.06E-01 2.41E-03 1.453E+04 75As
79Se 34 <6.5E+04 year     0.0529   5.29E-02 3.13E-04 6.966E-02 79Br
                     
85Kr 36 1.072E+01 year b   0.2505 0.0022 2.53E-01 1.50E-03 3.923E+02 85Rb
                     
86Rb 37 18.66 days b   0.6670 0.0945 7.62E-01 4.52E-03 8.138E+04 86Sr
                     
89Sr 38 50.55 days b   0.5829 0.0001 5.83E-01 3.46E-03 2.905E+04 89Y
90Sr 38 2.85E+01 year b   0.1958   1.96E-01 1.16E-03 1.364E+02 90Y
                     
90Y 39 2.671 days b   0.9332   9.33E-01 5.54E-03 5.441E+05 90Zr
91Y 39 58.51 days b   0.6039 0.0036 6.07E-01 3.60E-03 2.452E+04 91Zr
                     
93Zr 40 1.53E+06 year b   0.0471 0.0018 4.89E-02 2.90E-04 2.513E-03 93Nb
95Zr 40 64.02 days b   0.10 0.7337 8.54E-01 5.06E-03 2.148E+04 95Nb
                     
93mNb 41 1.36E+01 year IT   0.0281 0.0018 2.99E-02 1.77E-04 2.826E+02 93Nb
94Nb 41 2.03E+04 year b   0.1454 1.5715 1.7169 1.018E-02 1.873E-01 94Mo
95Nb 41 34.97 days b   0.0435 0.7643 8.078E-01 4.788E-03 3.910E+04 95Mo
                     
93Mo 42 3500 year EC   0.0051 0.0107 1.58E-02 9.37E-05 1.10 93Nb
99Mo 42 2.748 days b   0.4076 0.2723 6.799E-01 4.028E-03 4.796E+05 99Tc
                     
99Tc 43 2.13E+05 year b   0.0846   8.46E-02 5.01E-04 1.695E-02 99Ru
99mTc 43 6.006 hours IT   0.0142 0.1240 1.382E-01 8.186E-04 5.271E+06 99Tc
                     
103Ru 44 39.254 days b   0.1105 0.4851 5.96E-01 3.53E-03 3.227E+04 103Rh
106Ru 44 1.0 year b   0.1004   1.004E-01 5.951E-04 3.346E+03 106Rh
                     
103mRh 45 56.12 minutes IT   0.0375 0.0017 3.92E-02 2.32E-04 3.253E+07 103Rh
106Rh 45 2.17 hours b   0.3144 2.8826 3.197 1.894E-02 3.560E+09 106Pd
                     
107Pd 46 6.5E+06 year b     0.0093 9.3E-03 5.5E-05 5.143E-04 107Ag
                     
110Ag 47 24.6 seconds b (99.70%);
EC (0.30%)
  1.1842 0.0316 1.216 7.8E-03 4.169E+09 110Cd;
110Pd
110mAg 47 249.76 days b (98.64%);
IT (1.36%)
  0.0755 2.7392 2.815 1.669E-02 4.750E+03 110Cd;
110Ag
                     
113Cd 48 9.3E+15 year b   0.0933   9.13E-02 5.412E-04 3.402E-13 113In;
113mCd 48 1.37E+01 year b (99.9%);
IT (0.1%)
    0.1834 1.83E-01 1.08E-03 2.168E+02 113In;
113In
115mCd 48 44.6 days b   0.6029 0.0329 6.36E-01 3.76E-03 2.546E+04 115In
                     
111In 49 2.807 days EC   0.0340 0.4053 4.393E-01 2.604E-03 4.157E+05 111Cd
113mIn 49 1.658 hours IT   0.1340 0.2555 3.89E-01 2.31E-03 1.673E+07 113In
114mIn 49 49.51 days IT (95.7%);
EC (4.3%)
  0.1431 0.0943 2.37E-01 1.40E-03 2.313E+04 114In;
114Cd
                     
113Sn 50 115.09 days EC   0.1394 0.2808 4.E-01 2.48E-03 1.004E+04 113In
117mSn 50 13.61 days IT   0.1613 0.1580 3.19E-01 1.89E-03 7.969E+04 117Sn
119mSn 50 293.0 days IT   0.0783 0.0114 8.97E-02 5.32E-04 4.478E+03 119Sn
121mSn 50 5.5E+01 year IT (77.6%);
b (22.4%)
  0.0352 0.0050 4.02E-02 2.43E-04 5.912E+01 121Sn;
121Sb
123Sn 50 129.2 days b   0.5222 0.0069 5.29E-01 3.14E-03 8.219E+03 123Sb
125Sn 50 9.64 days b   0.8110 0.3124 1.123 6.656E-03 1.084E+05 125Sb
126Sn 50 ~1E+05 year b   0.1249 0.0573 1.82E-01 1.08E-03 2.837E-02 126Sb
                     
124Sb 51 60. days b   0.3897 1.8523 2.242 1.329E-02 1.749E+04 124Te
125Sb 51 2.73 year b   0.1257 0.4434 5.69E-01 3.37E-03 1.032E+03 125Te
126Sb 51 12.4 days b   0.3527 2.7496 3.102 1.839E-02 8.360E+04 126Te
126mSb 51 19.0 minutes b (86%);
IT (14%)
  0.6323 1.5484 2.181 1.292E-02 7.854E+07 126Te;
126Sb
                     
123mTe 52 119.7 days IT   0.10 0.1482 2.502E-01 1.482E-03 8.870E+03 123Te
125mTe 52 58 days IT   0.1106 0.0361 1.467E-01 8.690E-04 1.801E+04 125Te
127Te 52 9.35 hours b   0.2248 0.0048 2.30E-01 1.36E-03 2.639E+06 127I
127mTe 52 109 days IT (97.6%);
b (2.4%)
  0.0821 0.0111 9.32E-02 5.52E-04 9.432E+03 127Te;
127I
129Te 52 1.160 hours b   0.5422 0.0624 6.05E-01 3.58E-03 2.094E+07 129I
129mTe 52 33.6 days IT (64%);
b (36%)
  0.2663 0.0370 3.03E-01 1.80E-03 3.013E+04 129Te
129I
                     
123I 53 13.2 hours EC   0.0276 0.1729 2.005E-01 1.188E-03 1.940E+06 123Te
125I 53 60.14 days EC   0.0179 0.0423 6.02E-02 3.57E-04 1.737E+04 125Te
129I 53 1.57E+07 year b   0.0556 0.0248 8.04E-02 4.77E-04 1.765E-04 129Xe
131I 53 8.040 days b   0.1913 0.3826 5.74E-01 3.40E-03 1.240E+05 131Xe
                     
133Xe 54 5.245 days b   0.1363 0.0459 1.82E-01 1.08E-03 1.872E+05 133Cs
                     
134Cs 55 2.062 year b   0.1639 1.5555 1.719 1.019E-02 1.294E+03 134Ba
135Cs 55 3.0E+06 year b   0.0563   5.63E-02 3.32E-04 1.151E-03 135Ba
137Cs 55 3.017E+01 year b (94.6%);
b (5.4%)
    0.1708 1.71E-01 1.01E-03 8.698E+01 137mBa;
137Ba
                     
133Ba 56 1.054E+01 year EC   0.0547 0.4045 4.592E-01 2.722E-03 2.500E+02 133Cs
137mBa 56 2.552 minutes IT   0.0652 0.5991 6.64E-01 3.94E-03 5.379E+08 137Ba
                     
141Ce 58 32.50 days b   0.1707 0.0770 2.48E-01 1.47E-03 2.848E+04 141Pr
144Ce 58 284.9 days b   0.0918 0.0192 1.11E-01 6.58E-04 3.190E+03 144Pr
                     
143Pr 59 13.58 days b   0.3156   3.16E-01 1.87E-03 6.731E+04 143Nd
144Pr 59 17.28 minutes b   1.91 0.0289 1.238 7.338E-03 7.555E+07 144Nd
144mPr 59 7.2 minutes IT (99.96%);
b (0.04%)
  0.0464 0.0121 5.85E-02 3.43E-04 1.814E+08 144Pr;
144Nd
                     
146Pm 61 5.53 year EC (66.1%);
b (33.9%)
  0.0928 0.7542 8.47E-01 5.02E-03 4.428E+02 146Nd;
146Sm
147Pm 61 2.6234 year b   0.6196   6.E-02 3.67E-04 9.270E+02 147Sm
148Pm 61 5.370 days b   0.7235 0.5747 1.298 7.691E-03 1.643E+05 148Sm
148mPm 61 41.29 days b (95.4%);
IT (4.6%)
  0.1695 1.9861 2.156 1.278E-02 2.136E+04 148Sm;
148Pm
                     
151Sm 62 9.0E+01 year b   0.1251   1.25E-01 7.41E-04 2.631E+01 151Eu
                     
152Eu 63 1.333E+01 y EC (72.08%);
b (27.92%)
  0.1275 1.1628 1.290 7.646E-03 1.729E+02 152Sm;
152Gd
154Eu 63 8.8 year b   0.2794 1.2531 1.532 9.081E-03 2.699E+02 154Gd
155Eu 63 4.96 year b   0.0650 0.0633 1.28E-01 7.59E-04 4.651E+02 155Gd
                     
153Gd 64 241.6 days EC   0.0399 0.1015 1.414E-01 8.381E-04 3.526E+03 153Eu
                     
157Tb 65 150 year EC   0.0031 0.0050 8.10E-03 4.802E-05 1.519E+01 157Gd
158Tb 65 150 year EC (82%);
b (18%)
      9.02E-01 5.347E-03 1.508E+01 158Gd;
158Dy
160Tb 65 72.3 days b   0.2535 1.1271 1.381 8.186E-03 1.129E+04 160Dy
                     
169Yb 70 32.02 days EC   0.1117 0.3121 4.238E-01 2.512E-03 2.414E+04 169Tm
                     
175Hf 72 70.0 days EC   0.0439 0.3646 4.085E-01 2.422E-03 1.066E+04 175Lu
181Hf 72 42.39 days b   0.1943 0.5441 7.54E-01 4.47E-03 1.702E+04 181Ta
                     
182Ta 73 115.0 days b   0.73 1.3011 1.508 8.940E-03 6.253E+03 182W
                     
187Re 75 4.6E+10 year b   0.0007   2.59 1.535E-02 3.823E-08 187Os
                     
192Ir 77 73.831 days b (95.4%);
EC (4.6%)
  0.2162 0.8137 1.030 6.105E-03 9.211E+03 192Pt;
192Os
                     
201Tl 81 3.046 days EC   0.0481 0.0924 1.40E-01 8.30E-04 2.132E+05 201Hg
207Tl 81 4.77 minutes b   0.4931 0.0022 4.95E-01 2.93E-03 1.904E+08 207Pb
208Tl 81 3.053 minutes b   0.5979 3.3742 3.972 2.354E-02 2.945E+08 208Pb
                     
209Pb 82 3.253 hours b   0.1980   1.98E-01 1.17E-03 4.544E+06 209Bi
210Pb 82 2.232E+01 year b   0.0343   3.43E-02 2.029E-04 7.630E+01 210Bi
211Pb 82 36.1 minutes b   0.4523 0.0678 5.E-01 3.083E-03 2.468E+07 211Bi
212Pb 82 10.64 hours b   0.1752 0.1453 3.E-01 1.90E-03 1.389E+06 212Bi
                     
211Bi 83 2.14 a (99.727%);
b (0.273%)
6.5505 0.0099 0.0467 6.607 3.916E-02 4.184E+08 207Tl;
211Po
212Bi 83 1.0092 hours a (35.94%);
b (64.06%)
2.1740 0.5025 0.1061 2.783 1.649E-02 1.465E+07 208Tl;
212Po
213Bi 83 45.59 minutes a (2.16%);
b (97.84%)
0.1268 0.4563 0.0825 6.66E-01 3.95E-03 1.934E+07 209Tl;
213Po
                     
209Po 84 102 year a (99.74%);
EC (0.26%)
      4.9645 2.943E-01 1.68E+01 205Pb;
209Bi
210Po 84 138.4 days a 5.3044     5.304 3.144E-02 4.493E+03 206Pb
212Po 84 2.98E-07 seconds a 8.7844     8.784 5.7E-02 1.774E+17 208Pb
213Po 84 4.2E-06 seconds a 8.3757     8.375 4.964E-02 1.261E+16 209Pb
215Po 84 1.780E-03 seconds a 7.3864     7.386 4.378E-02 2.948E+13 211Pb
216Po 84 1.50E-02 seconds a 6.7785     6.779 4.018E-02 3.482E+11 212Pb
                     
217At 85 3.23E-02 seconds a 7.0657   0.0002 7.066 4.189E-02 1.610E+12 213Bi
                     
219Rn 86 3.96 seconds a 6.8122 0.0064 0.0560 6.875 4.076E-02 1.301E+10 215Po
202Rn 86 55.6 seconds a 6.2878   0.0005 6.288 3.727E-02 9.223E+08 216Po
222Rn 86 3.825 days a 5.4892   0.0004 5.490 3.255E-02 1.538E+05 218Po
                     
221Fr 87 4.9 minutes a 6.3571 0.0084 0.0277 6.393 3.789E-02 1.772E+08 217At
223Fr 87 21.8 minutes b   0.3805 0.0542 4.35E-01 2.85E-03 3.868E+07 223Ra
                     
223Ra 88 11.43 days a 5.6972 0.0731 0.1348 5.905 3.500E-02 5.121E+04 219Rn
224Ra 88 3.66 days a 5.6751 0.0022 0.0103 5.688 3.372E-02 1.593E+05 202Rn
225Ra 88 14.2 days b   0.1057 0.0137 1.19E-01 7.08E-04 3.9E+04 225Ac
226Ra 88 1.600E+03 year a 4.7741 0.0035 0.0067 4.784 2.836E-02 9.887E-01 222Rn
228Ra 88 5.75 year b   0.0116   1.16E-02 6.88E-05 2.340E+02 228Ac
                     
225Ac 89 10.0 days a 5.7501 0.0257 0.0176 5.793 3.434E-02 5.803E+04 221Fr
227Ac 89 2.177E+01 year b (98.62%);
a (1.38%)
0.0673 0.0125 0.0002 8.00E-02 4.74E-04 7.233E+01 227Th;
223Fr
228Ac 89 6.13 hours b   0.4292 0.9269 1.356 8.038E-03 2.242E+06 228Th
                     
227Th 90 18.718 days a 5.9022 0.0543 0.1113 6.068 3.597E-02 3.073E+04 223Ra
228Th 90 1.913 year a 5.3992 0.01 0.0034 5.423 3.214E-02 8.196E+02 224Ra
229Th 90 7.340E+03 year a 4.86   0.0343 4.896 2.902E-02 2.127E-01 225Ra
230Th 90 7.54E+04 year a 4.6651   0.0004 4.665 2.765E-02 2.109E-02 226Ra
231Th 90 1.0633 days b 0.1732   0.0295 2.03E-01 1.21E-03 5.316E+05 231Pa
232Th 90 1.405E+10 year a 4.0056   0.0002 4.006 2.375E-02 1.097E-07 228Ra
234Th 90 24.10 days b   0.0158 0.0094 2.52E-02 1.49E-04 2.316E+04 234Pa
                     
231Pa 91 3.276E+04 year a 4.9230 0.0483 0.0399 5.011 2.970E-02 4.723E-02 227Ac
233Pa 91 27.0 days b   0.1941 0.42 3.98E-01 2.36E-03 2.075E+04 233U
234mPa 91 1.17 minutes b (99.87%);
IT (0.13%)
  0.8227 0.0121 8.35E-01 4.95E-03 6.868E+08 234U;
234Pa
                     
232U 92 6.89E+01 year a 5.3065   0.0002 5.307 3.146E-02 2.140E+01 228Th
233U 92 1.592E+05 year a 4.8141 0.0055 0.0013 4.821 2.857E-02 9.680E-03 229Th
234U 92 2.454E+05 year a 4.7732   0.0001 4.773 2.829E-02 6.248E-03 230Th
235U 92 7.037E+08 year a 4.3785 0.0426 0.1561 4.577 2.713E-02 2.161E-06 231Th
236U 92 2.342E+07 year a 4.4793 0.0108 0.0015 4.492 2.662E-02 6.469E-05 232Th
238U 92 4.468E+09 year a 4.1945 0.0095 0.0013 4.5 2.492E-02 3.362E-07 234Th
                     
236Np 93 1.550E+05 year EC (91%);
b (8.9%);
a (0.20%)
  0.1967 0.1411 3.38E-01 2.00E-03 1.317E-02 236U;
236Pu;
232Pa
237Np 93 2.140E+06 year a 4.7604 0.0640 0.0327 4.857 2.879E-02 7.049E-04 233Pa
239Np 93 2.355 days b   0.2521 0.1740 4.26E-01 2.53E-03 2.3E+05 239Pu
                     
236Pu 94 2.851 year a 5.7521 0.0126 0.00 5.767 3.418E-02 5.313E+02 232U
238Pu 94 8.774E+01 year a 5.4871 0.0099 0.0018 5.499 3.2593E-02 1.712E+01 234U
239Pu 94 2.411E+04 year a 5.1011   0.0001 5.101 3.024E-02 6.216E-02 235U
240Pu 94 6.563E+03 year a 5.1549     5.155 3.056E-02 2.279E-01 236U
241Pu 94 1.44E+01 year b 0.0001   0.0052 5.3E-03 3.2E-05 1.030E+02 241Am
242Pu 94 3.763E+05 year a 4.8901 0.0081 0.0014 4.900 2.904E-02 3.818E-03 238U
244Pu 94 8.26E+07 year a (99.875%);
SPF (0.125%)
4.5751 0.0007 0.0001 4.576 2.712E-02 1.774E-05 240U;
(fission
products)
                     
241Am 95 4.327E+02 year a 5.4801 0.0304 0.0287 5.539 3.283E-02 3.432 237Np
242Am 95 16.01 hours b (82.7%);
EC (17.3%)
  0.1781 0.0180 1.96E-01 1.16E-03 8.084E+05 242Cm;
242Pu
242mAm 95 1.41E+02 year IT (99.55%);
a (0.45%)
0.0232 0.0403 0.0049 6.84E-02 4.05E-04 9.718 242Am;
238Np
243Am 95 7.380E+03 year a 5.2656   0.0481 5.3137 3.1496E-02 1.993E-01 239Np
                     
242Cm 96 162.94 days a 6.0434 0.0090 0.0018 6.0542 3.5886E-02 3.306E+03 238Pu
243Cm 96 2.85E+01 year a (99.76%);
EC (0.24%)
5.8380 0.1129 0.1316 6.083 3.605E-02 5.162E+01 239Pu;
243Am
244Cm 96 1.811E+01 year a 5.7965   0.0016 5.798 3.437E-02 8.090E+01 240Pu
245Cm 96 8.5E+03 year a 5.3631 0.1342 0.1178 5.615 3.329E-02 1.717E-01 241Pu
                     
246Cm 96 4.73E+03 year a 5.3764 0.0072 0.0014 5.385 3.192E-02 3.072E-01 242Pu
247Cm 96 1.56E+07 year a 4.9475   0.3152 5.263 3.119E-02 9.278E-05 243Pu
                     
248Cm 96 3.40E+05 year a (91.74%);
SPF (8.26%)
4.6524     4.6524 2.7577E-02 4.251E-03 244Pu;
(fission
products)
                     
252Cf 98 2.645 year a (96.908%);
SPF (3.092%)
5.9308 0.0051 0.0011 5.9370 3.5191E-02 5.378E+02 248Cm;
(fission
products)

aBased on refs 6-9.;
by-years; d-days; h-hours; min-minutes; and s-seconds;
ca -alpha decay; b -negative beta decay; EC-electron capture; IT-isometic transition (radioactive transition from one nuclear isomer to another of lower energy); and SPF-spontaneous fission.
da -alpha decay; e -total electron emissions; and g and X-gamma and X-ray photons.;
eThe sum of the average energies for different radiation types in MEV/disintegration or W/Ci (includes alpha and beta particles, discrete electrons, and photons). The "value" indicates the amount of energy (heat) that could be deposited in a radioactive material from each decay event if none of the radiation escaped from the material. Neutrinos are not included.


List of Tables

[PTP Library/library/Doe/Misc/gn1.htm]


About This Document
Last Updated 5/05/1997 (mmj)