Table 20.5 Representative radioactive nuclides
a,b
No.
Nuclide
Half-life
No.
Nuclide
Half-life
No.
Nuclide
Half-life
1
H-3
12.3
years
21
Se-79
377.0
E3 years
41
Cs-137
30.1
years
2
Be-10
1.5
E6 years
22
Rb-87
48.1
E9 years
42
Ba-133
10.5
years
3
C-14
5.7
E3 years
23
Sr-90
28.8
years
43
Sn-126
198.0
E3 years
4
Na-22
2.6
years
24
Nb-94
20.3
E3 years
44
Sb-124
60.2
days
5
Si-32
153.0
years
25
Nb-95
35.0
days
45
Sb-125
2.8
years
6
S-35
87.5
days
26
Mo-93
4.0
E3 years
46
Ce-141
32.5
days
7
Cl-36
301.0
E3 years
27
Mo-99
2.7
days
47
Ce-144
284.9
days
8
K-40
1.2
E9 years
28
Tc-99
211.1
E3 years
48
Eu-152
13.5
years
9
Sc-46
83.8
days
29
Tc-99m
6.0
hours
49
Eu-154
8.6
years
10
Ca-41
102.0
E3 years
30
Zr-93
1.5
E6 years
50
Eu-155
4.8
years
11
Cr-51
27.7
days
31
Zr-95
64.0
days
51
Gd-153
240.4
days
12
Mn-54
312.1
days
32
Ru-103
39.3
days
52
Ho-166m
1.2
E3 years
13
Fe-55
2.7
years
33
Ru-106
1.0
years
53
Hf-181
42.4
days
14
Fe-59
44.5
days
34
Ag-108m
438.0
years
54
Au-199
3.1
days
15
Co-57
271.7
days
c
35
Ag-110m
249.8
days
16
Co-58
70.9
days
36
I-129
15.7
E6 years
17
Co-60
5.3
years
37
Cd-113m
14.1
years
18
Ni-59
76.0
E3 years
38
I-131
8.0
days
19
Ni-63
100.1
years
39
Cs-134
2.1
years
20
Zn-65
244.1
days
40
Cs-135
2.3
E6 years
a
Half-life is referred to ORLIBJ40 decay library
b
E3 years
¼ 10
3
years, E6 years
¼ 10
6
years
c
Half-life of Co-57 is not contained in ORLIBJ40, so it is referred to [4]
20 Sensitivity Analyses of Initial Compositions and Cross Sections. . .
239