| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 147.8 (b) | 146.4 (b) | 0.991 | − | 5.797 (b) | 8.004 (b) |
| 2 | (n,elastic) | 8.793 (b) | 9.872 (b) | 1.123 | − | 2.740 (b) | 4.831 (b) |
| 4 | (n,inelastic) | ( E-thr = 61.75 keV ) | 846.0 (μb) | 1.174 (b) | |||
| 16 | (n,2n) | ( E-thr = 5.179 MeV ) | 241.3 (mb) | 13.24 (mb) | |||
| 17 | (n,3n) | ( E-thr = 11.66 MeV ) | 274.8 (mb) | 38.82 (μb) | |||
| 18 | (n,fission) | 81.78 (b) | 79.86 (b) | 0.976 | 609.6 (b) | 2.540 (b) | 1.908 (b) |
| 37 | (n,4n) | ( E-thr = 17.20 MeV ) | − | 64.32 (nb) | |||
| 102 | (n,γ) | 57.21 (b) | 56.66 (b) | 0.990 | 534.7 (b) | 14.82 (nb) | 74.23 (mb) |
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These cross sections are calculated from JENDL-3.2 at 300K.
The background color of each cell noted a cross section means the order of the cross-section value.
The unit of cross section, (b), means barns, and SI prefixes are used as following.
(kb) → 103(b), (mb) → 10−3(b),
(μb) → 10−6(b), (nb) → 10−9(b).
MT is a number that defines a reaction type. For the relation between MT and reaction type, please see here or refer to the manual of ENDF formats.
Maxwellian Average :
where T denotes the temperature, and kB the Boltzmann constant.
The upper and lower limits of integration, EL and EU
are set to 10−5 eV and 10 eV, respectively.
Resonance Integral :
with EL = 0.5 eV and EU = 10 MeV.
U-235 Thermal Fission-Neutron Spectrum Average (Fiss. Spec. Average) :
with EL = 10−5 eV and EU = 20 MeV.
The parameters a and b are 0.988 MeV and 2.249 MeV−1, respectively.
Westcott g-factor :
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