| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 2.322 (kb) | 2.439 (kb) | 1.050 | − | 5.711 (b) | 7.729 (b) |
| 2 | (n,elastic) | 7.680 (b) | 8.672 (b) | 1.129 | − | 2.827 (b) | 4.429 (b) |
| 4 | (n,inelastic) | ( E-thr = 44.28 keV ) | 415.9 (mb) | 1.497 (b) | |||
| 16 | (n,2n) | ( E-thr = 5.562 MeV ) | 271.8 (mb) | 5.456 (mb) | |||
| 17 | (n,3n) | ( E-thr = 12.23 MeV ) | 8.047 (mb) | 1.506 (μb) | |||
| 18 | (n,fission) | 2.095 (kb) | 2.200 (kb) | 1.050 | 994.9 (b) | 2.181 (b) | 1.750 (b) |
| 19 | (n,f) | 2.095 (kb) | 2.200 (kb) | 1.050 | 994.8 (b) | 1.215 (b) | 1.745 (b) |
| 20 | (n,nf) | ( E-thr = 6.000 MeV ) | 839.9 (mb) | 5.482 (mb) | |||
| 21 | (n,2nf) | ( E-thr = 10.00 MeV ) | 128.8 (mb) | 22.75 (μb) | |||
| 102 | (n,γ) | 219.0 (b) | 229.4 (b) | 1.047 | 186.8 (b) | 732.0 (μb) | 45.65 (mb) |
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These cross sections are calculated from JENDL-4.0 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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