| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 119.2 (b) | 120.5 (b) | 1.011 | − | 5.721 (b) | 7.695 (b) |
| 2 | (n,elastic) | 19.45 (b) | 21.75 (b) | 1.118 | − | 2.733 (b) | 4.692 (b) |
| 4 | (n,inelastic) | ( E-thr = 43.67 keV ) | 320.2 (mb) | 1.557 (b) | |||
| 16 | (n,2n) | ( E-thr = 6.873 MeV ) | 473.0 (mb) | 4.811 (mb) | |||
| 17 | (n,3n) | ( E-thr = 12.65 MeV ) | 127.0 (mb) | 14.54 (μb) | |||
| 18 | (n,fission) | 6.221 (mb) | 6.247 (mb) | 1.004 | 5.259 (b) | 2.067 (b) | 1.223 (b) |
| 102 | (n,γ) | 99.78 (b) | 98.75 (b) | 0.990 | 631.3 (b) | 25.75 (μb) | 217.7 (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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