| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 64.81 (b) | 66.01 (b) | 1.019 | − | 5.848 (b) | 8.186 (b) |
| 2 | (n,elastic) | 11.06 (b) | 12.46 (b) | 1.126 | − | 2.758 (b) | 5.144 (b) |
| 4 | (n,inelastic) | ( E-thr = 45.90 keV ) | 10.29 (mb) | 731.5 (mb) | |||
| 16 | (n,2n) | ( E-thr = 6.195 MeV ) | 86.60 (mb) | 4.930 (mb) | |||
| 17 | (n,3n) | ( E-thr = 11.33 MeV ) | 223.0 (mb) | 35.17 (μb) | |||
| 18 | (n,fission) | 33.03 (b) | 32.94 (b) | 0.997 | 108.8 (b) | 2.770 (b) | 2.251 (b) |
| 37 | (n,4n) | ( E-thr = 17.98 MeV ) | − | 11.66 (nb) | |||
| 102 | (n,γ) | 20.71 (b) | 20.61 (b) | 0.995 | 47.33 (b) | 185.5 (nb) | 51.28 (mb) |
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These cross sections are calculated from JENDL-3.3 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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