| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 1.478 (kb) | 1.481 (kb) | 1.002 | − | 5.670 (b) | 7.617 (b) |
| 2 | (n,elastic) | 13.03 (b) | 14.71 (b) | 1.129 | − | 3.167 (b) | 5.297 (b) |
| 4 | (n,inelastic) | ( E-thr = 16.94 keV ) | 15.80 (mb) | 2.054 (b) | |||
| 16 | (n,2n) | ( E-thr = 4.807 MeV ) | 1.160 (b) | 66.75 (mb) | |||
| 17 | (n,3n) | ( E-thr = 11.27 MeV ) | 917.0 (mb) | 150.8 (μb) | |||
| 18 | (n,fission) | 15.00 (b) | 15.06 (b) | 1.004 | 10.88 (b) | 410.0 (mb) | 109.8 (mb) |
| 102 | (n,γ) | 1.450 (kb) | 1.451 (kb) | 1.000 | 643.0 (b) | 6.071 (nb) | 86.92 (mb) |
|
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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