As seen in Table 5.1, the thermal cross section for
137 Cs is about twice as large as
the previous data reported by Stupegia [2]. As for
90 Sr, its thermal cross section is
Table 5.1 Results of thermal neutron capture cross sections and resonance integrals for longlived fission products (LLFPs)
Nuclide (half-life)
Reported data (author, year)
JAEA data
137
Cs (30 years)
σ eff ¼ 0.11 Æ 0.03 b (Stupegia
1960 [2])
σ 0 ¼ 0.25 Æ 0.02 b
I 0 ¼ 0.36 Æ 0.07 b (1990, 1993, 2000
[3–5])
90
Sr (29 years)
σ eff ¼ 0.8 Æ 0.5 b (Zeisel 1966
[6])
σ 0 ¼ 10.1 Æ 1.3/4.2 mb
I 0 0.16 b (1994 [7])
σ 0 ¼ 10.1 Æ 1.3 mb
I 0 ¼ 104 Æ 16 mb (2001 [8])
99
Tc
(2.1 Â 10
5 years)
σ 0 ¼ 20 Æ 2 b
σ 0 ¼ 22.9 Æ 1.3 b
I 0 ¼ 186 Æ 16 b (Lucas 1977 [9]) I 0 ¼ 398 Æ 38 b (1995 [10])
129
I
(1.6 Â 10
7 years)
σ 0 ¼ 27 Æ 2 b
σ 0 ¼ 30.3 Æ 1.2 b
I 0 ¼ 36 Æ 4 b (Eastwood 1958
[11])
I 0 ¼ 33.8 Æ 1.4 b (1996 [12])
127
I (Stable)
σ 0 ¼ 4.7 Æ 0.2 b
σ 0 ¼ 6.40 Æ 0.29 b
I 0 ¼ 109 Æ 5 b (Friedman 1983
[13])
I 0 ¼ 162 Æ 8 b (1999 [14])
135
Cs
(3 Â 10
6 years)
σ 0 ¼ 8.7 Æ 0.5 b
σ 0 ¼ 8.3 Æ 0.3 b
I 0 ¼ 61.7 Æ 2.3 b (Baerg 1958
[15])
I 0 ¼ 38.1 Æ 2.6 b (1997 [16])
134
Cs (2 years)
σ eff ¼ 134 Æ 12 b (Bayly 1958
[17])
σ eff ¼ 141 Æ 9 b (1999 [18])
133
Cs (Stable)
σ 0 ¼ 30.4 Æ 0.8 b
σ 0 ¼ 29.0 Æ 1.0 b
I 0 ¼ 461 Æ 25 b (Baerg 1960 [19]) I 0 ¼ 298 Æ 16 b (1999 [20])
166m Ho
(1.2 Â 10
3 years)
σ 0 ¼ 9,140 Æ 650 b
σ eff ¼ 3 Æ 1 kb (2000 [22])
I 0 ¼ 1,140 Æ 90 b (Masyanov
1993 [21])
σ 0 ¼ 3.11 Æ 0.82 kb
I 0 ¼ 10.0 Æ 2.7 kb (2002 [23])
Table 5.2 Results of thermal neutron capture cross sections and resonance integrals for minor
actinides (MAs)
Nuclide (half-life)
Reported data (author, year)
JAEA data
237
Np
(2.14 Â 10
6 years)
σ 0 ¼ 158 Æ 3 b
σ 0 ¼ 141.7 Æ 5.4 b
I 0 ¼ 652 Æ 24 b (Kobayashi 1994 [24]) I 0 ¼ 862 Æ 51 b (2003 [25])
σ 0 ¼ 169 Æ 6 b (2006 [26])
238
Np (2.1 days)
No data
σ eff ¼ 479 Æ 24 b (2004
[27])
241
Am (432 years)
σ 0, g ¼ 768 Æ 58 b
σ 0, g ¼ 628 Æ 22 b
I 0, g ¼ 1,694 Æ 146 b (Shinohara 1997
[28])
I 0, g ¼ 3.5 Æ 0.3 kb (2007
[29])
243
Am (7,370 years)
σ 0, m ¼ 80 b
σ eff ¼ 174.0 Æ 5.3 b (2006
[31])
σ 0, g ¼ 84.3 b (Ice 1966 [30])
42
S. Nakamura et al.
137 Cs is about twice as large as
the previous data reported by Stupegia [2]. As for
90 Sr, its thermal cross section is
Table 5.1 Results of thermal neutron capture cross sections and resonance integrals for longlived fission products (LLFPs)
Nuclide (half-life)
Reported data (author, year)
JAEA data
137
Cs (30 years)
σ eff ¼ 0.11 Æ 0.03 b (Stupegia
1960 [2])
σ 0 ¼ 0.25 Æ 0.02 b
I 0 ¼ 0.36 Æ 0.07 b (1990, 1993, 2000
[3–5])
90
Sr (29 years)
σ eff ¼ 0.8 Æ 0.5 b (Zeisel 1966
[6])
σ 0 ¼ 10.1 Æ 1.3/4.2 mb
I 0 0.16 b (1994 [7])
σ 0 ¼ 10.1 Æ 1.3 mb
I 0 ¼ 104 Æ 16 mb (2001 [8])
99
Tc
(2.1 Â 10
5 years)
σ 0 ¼ 20 Æ 2 b
σ 0 ¼ 22.9 Æ 1.3 b
I 0 ¼ 186 Æ 16 b (Lucas 1977 [9]) I 0 ¼ 398 Æ 38 b (1995 [10])
129
I
(1.6 Â 10
7 years)
σ 0 ¼ 27 Æ 2 b
σ 0 ¼ 30.3 Æ 1.2 b
I 0 ¼ 36 Æ 4 b (Eastwood 1958
[11])
I 0 ¼ 33.8 Æ 1.4 b (1996 [12])
127
I (Stable)
σ 0 ¼ 4.7 Æ 0.2 b
σ 0 ¼ 6.40 Æ 0.29 b
I 0 ¼ 109 Æ 5 b (Friedman 1983
[13])
I 0 ¼ 162 Æ 8 b (1999 [14])
135
Cs
(3 Â 10
6 years)
σ 0 ¼ 8.7 Æ 0.5 b
σ 0 ¼ 8.3 Æ 0.3 b
I 0 ¼ 61.7 Æ 2.3 b (Baerg 1958
[15])
I 0 ¼ 38.1 Æ 2.6 b (1997 [16])
134
Cs (2 years)
σ eff ¼ 134 Æ 12 b (Bayly 1958
[17])
σ eff ¼ 141 Æ 9 b (1999 [18])
133
Cs (Stable)
σ 0 ¼ 30.4 Æ 0.8 b
σ 0 ¼ 29.0 Æ 1.0 b
I 0 ¼ 461 Æ 25 b (Baerg 1960 [19]) I 0 ¼ 298 Æ 16 b (1999 [20])
166m Ho
(1.2 Â 10
3 years)
σ 0 ¼ 9,140 Æ 650 b
σ eff ¼ 3 Æ 1 kb (2000 [22])
I 0 ¼ 1,140 Æ 90 b (Masyanov
1993 [21])
σ 0 ¼ 3.11 Æ 0.82 kb
I 0 ¼ 10.0 Æ 2.7 kb (2002 [23])
Table 5.2 Results of thermal neutron capture cross sections and resonance integrals for minor
actinides (MAs)
Nuclide (half-life)
Reported data (author, year)
JAEA data
237
Np
(2.14 Â 10
6 years)
σ 0 ¼ 158 Æ 3 b
σ 0 ¼ 141.7 Æ 5.4 b
I 0 ¼ 652 Æ 24 b (Kobayashi 1994 [24]) I 0 ¼ 862 Æ 51 b (2003 [25])
σ 0 ¼ 169 Æ 6 b (2006 [26])
238
Np (2.1 days)
No data
σ eff ¼ 479 Æ 24 b (2004
[27])
241
Am (432 years)
σ 0, g ¼ 768 Æ 58 b
σ 0, g ¼ 628 Æ 22 b
I 0, g ¼ 1,694 Æ 146 b (Shinohara 1997
[28])
I 0, g ¼ 3.5 Æ 0.3 kb (2007
[29])
243
Am (7,370 years)
σ 0, m ¼ 80 b
σ eff ¼ 174.0 Æ 5.3 b (2006
[31])
σ 0, g ¼ 84.3 b (Ice 1966 [30])
42
S. Nakamura et al.