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Radionuclide Half-Life Measurements Data
M. P. Unterweger, D. D. Hoppes, F. J. Schima, and J. S. Coursey
| Radionuclide | Number of Sources | Number of Half Lives Followed | Half Life* | Statistical Standard Uncertainty | Other Standard Uncertainty | References |
|---|---|---|---|---|---|---|
| 3H | 18 | 3 | 4500 ± 8 d | 8 | 0 | 1 (a) |
| 18F | 3 | 13.1 | 1.82951 ± 0.00034 h | 0.00024 | 0.00024 | § |
| 22Na | 5 | 1.9 - 4.7 | 950.97 ± 0.15 d | 0.09 | 0.12 | § |
| 24Na | 14 | 1.1 - 7.6 | 14.9512 ± 0.0032 h | 0.0009 | 0.0031 | § |
| 32P | 2 | 2.8 | 14.263 ± 0.003 d | 0.003 | 0.0 | 6 |
| 44Ti | 1 | 0.35 | 22154 ± 456 d | 180 | 419 | 2 |
| 46Sc | 4 | 3.6 - 10.3 | 83.831 ± 0.066 d | 0.030 | 0.059 | § |
| 51Cr | 11 | 2.3 - 8.9 | 27.7010 ± 0.0012 d | 0.0007 | 0.0009 | § |
| 54Mn | 2 | 3.3 - 7.4 | 312.028 ± 0.034 d | 0.034 | 0.0 | § |
| 57Co | 7 | 4.7 - 10.4 | 272.11 ± 0.26 d | 0.09 | 0.25 | § |
| 58Co | 1 | 9.1 | 70.77 ± 0.11 d | 0.11 | 0.0 | § |
| 59Fe | 6 | 4.0 - 9.3 | 44.5074 ± 0.0072 d | 0.0048 | 0.0053 | § |
| 60Co | 8 | 3.7 - 5.3 | 1925.20 ± 0.25 d | 0.10 | 0.23 | §,6 |
| 62Cu | 3 | 2.7 - 3.9 | 9.6725 ± 0.0080 min | 0.0080 | 0.0 | 3,6 |
| 65Zn | 1 | 3.2 | 244.164 ± 0.099 d | 0.099 | 0.0 | § |
| 67Ga | 13 | 1.8 - 8.3 | 3.26154 ± 0.00054 d | 0.00015 | 0.00052 | § |
| 75Se | 19 | 2.4 - 8.7 | 119.809 ± 0.066 d | 0.014 | 0.065 | § |
| 85Kr | 1 | 1.9 | 3935.7 ± 1.2 d | 1.2 | 0.0 | §,6 |
| 85Sr | 8 | 1.1 - 4.8 | 64.8530 ± 0.0081 d | 0.0039 | 0.0071 | § |
| 88Y | 8 | 1.3 - 8.1 | 106.626 ± 0.044 d | 0.017 | 0.041 | § |
| 99Mo | 14 | 3.6 - 9.5 | 65.9239 ± 0.0058 h | 0.0031 | 0.0049 | § |
| 99mTc | 33 | 2.1 - 12.0 | 6.00718 ± 0.00087 h | 0.00015 | 0.00086 | § (b) |
| 99mTc | 17 | 1.9 - 8.0 | 6.0123 ± 0.0032 h | 0.0007 | 0.0031 | 6 (c) |
| 103Ru | 7 | 0.4 | 39.310 ± 0.044 d | 0.044 | 0.0 | 6 |
| 109Cd | 2 | 3.4 - 5.3 | 463.26 ± 0.63 d | 0.36 | 0.51 | § |
| 110mAg | 1 | 9.3 | 249.950 ± 0.024 d | 0.024 | 0.0 | § |
| 111In | 11 | 1.4 - 9.3 | 2.80477 ± 0.00053 d | 0.00017 | 0.00051 | § |
| 113Sn | 11 | 2.3 - 11.0 | 115.079 ± 0.080 d | 0.025 | 0.076 | § |
| 117mSn | 10 | 1.5 - 4.0 | 14.00 ± 0.05 d | 0.05 | 0.0 | 4 |
| 123I | 3 | 5.4 - 12.7 | 13.2235 ± 0.0019 h | 0.0019 | 0.0 | § |
| 125I | 18 | 1.4 - 6.2 | 59.49 ± 0.13 d | 0.03 | 0.12 | § |
| 125Sb | 1 | 5.4 | 1007.56 ± 0.10 d | 0.10 | 0.0 | §,6 |
| 127Xe | 5 | 1.1 - 11.5 | 36.3446 ± 0.0028 d | 0.0028 | 0.0 | § |
| 131I | 21 | 1.0 - 10.9 | 8.0197 ± 0.0022 d | 0.0005 | 0.0021 | § |
| 131mXe | 2 | 1.8 | 11.934 ± 0.021 d | 0.014 | 0.016 | § |
| 133Ba | 4 | 2.0 | 3854.7 ± 2.8 d | 1.3 | 2.5 | §,6 |
| 133Xe | 3 | 4.8 - 11.2 | 5.24747 ± 0.00045 d | 0.00045 | 0.0 | § |
| 134Cs | 5 | 1.7 - 3.0 | 753.88 ± 0.15 d | 0.11 | 0.11 | § |
| 137Cs | 6 | 0.7 - 0.9 | 11018.3 ± 9.5 d | 3.5 | 8.8 | §,6 |
| 139Ce | 9 | 1.5 - 6.4 | 137.734 ± 0.091 d | 0.029 | 0.086 | § |
| 140Ba | 10 | 1.8 - 4.4 | 12.7527 ± 0.0023 d | 0.0009 | 0.0022 | § |
| 140La | 2 | 4.2 | 40.293 ± 0.012 h | 0.008 | 0.009 | § |
| 141Ce | 1 | 6.1 | 32.510 ± 0.024 d | 0.024 | 0.0 | § |
| 144Ce | 1 | 3.9 | 284.534 ± 0.032 d | 0.032 | 0.0 | §,6 |
| 152Eu | 4 | 1.6 - 1.8 | 4947.2 ± 1.1 d | 0.7 | 0.8 | §,6 |
| 153Gd | 2 | 7.3 | 239.472 ± 0.069 d | 0.041 | 0.055 | § |
| 153Sm | 1 | 7.3 | 46.2853 ± 0.0014 h | 0.0014 | 0.0 | § |
| 154Eu | 3 | 2.4 | 3145.2 ± 1.1 d | 1.1 | 0.0 | §,6 |
| 155Eu | 2 | 3.1 - 4.3 | 1739.06 ± 0.45 d | 0.45 | 0.0 | §,6 |
| 166Ho | 2 | 5.4 - 7.2 | 26.794 ± 0.023 h | 0.013 | 0.019 | §,6 |
| 169Yb | 14 | 3.4 - 9.5 | 32.0147 ± 0.0093 d | 0.0026 | 0.0089 | § |
| 177Lu | 4 | 2 - 5 | 6.64 ± 0.01 d | 0.01 | 0.0 | 5 |
| 181W | 3 | 5.9 - 6.6 | 121.095 ± 0.064 d | 0.042 | 0.048 | § |
| 186Re | 2 | 5.7 - 6.5 | 89.248 ± 0.069 h | 0.018 | 0.067 | § |
| 188Re | 3 | 4.2 - 7.1 | 17.001 ± 0.022 h | 0.09 | 0.021 | §,6 |
| 188W | 1 | 4.0 | 69.783 ± 0.048 d | 0.048 | 0.0 | 6 |
| 192Ir | 1 | 2.4 | 73.810 ± 0.019 d | 0.019 | 0.0 | § |
| 195Au | 5 | 0.6 - 6.0 | 186.098 ± 0.047 d | 0.021 | 0.042 | § |
| 198Au | 4 | 4.5 - 7.4 | 2.69517 ± 0.00021 d | 0.00021 | 0.0 | § |
| 201Tl | 12 | 2.6 - 11.5 | 3.0456 ± 0.0015 d | 0.0004 | 0.0014 | § |
| 202Tl | 1 | 1.4 | 12.466 ± 0.081 d | 0.081 | 0.0 | § |
| 203Hg | 14 | 1.7 - 6.6 | 46.619 ± 0.027 d | 0.007 | 0.026 | § |
| 203Pb | 7 | 1.8 - 2.8 | 51.923 ± 0.037 h | 0.013 | 0.034 | § |
| 207Bi | 2 | 0.9 | 11523. ± 15. d | 9 | 12 | §,6 |
| 228Th | 6 | 1.7 - 8.3 | 698.60 ± 0.36 d | 0.14 | 0.33 | § |
| * | The stated uncertainties are the sum, in quadrature, of the statistical uncertainty (the "external standard deviation" in the weighted mean) and other uncertainties which include those from the Stevenson nist-equation (NBS Special Publication 626) and from the correction for the 210Bi ingrowth in the radium reference sources. |
| (a) | Measured by internal gas proportional counting. |
| (b) | Normal saline solution. |
| (c) | Acid solution. |
Contacts
Radioactivity Group
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(301) 975-5536
Created September 6, 2009, Updated November 15, 2019