![Radionuclide Half-Life Measurements Made at NIST Radionuclide Half-Life Measurements Made at NIST](https://webarchive.library.unt.edu/web/20120921065036im_/http://www.nist.gov/pml/data/images/halflifeS_1.gif)
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 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. |
|