| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 7.636 (kb) | 8.368 (kb) | 1.096 | − | 5.727 (b) | 7.738 (b) |
| 2 | (n,elastic) | 5.267 (b) | 6.577 (b) | 1.249 | − | 2.520 (b) | 4.339 (b) |
| 4 | (n,inelastic) | 0.000 (b) | 0.000 (b) | − | 5.239 (b) | 367.9 (mb) | 1.482 (b) |
| 16 | (n,2n) | ( E-thr = 5.562 MeV ) | 280.6 (mb) | 5.410 (mb) | |||
| 17 | (n,3n) | ( E-thr = 12.23 MeV ) | 8.539 (mb) | 1.617 (μb) | |||
| 18 | (n,fission) | 6.400 (kb) | 7.008 (kb) | 1.095 | 1.542 (kb) | 2.550 (b) | 1.838 (b) |
| 102 | (n,γ) | 1.231 (kb) | 1.354 (kb) | 1.100 | 239.3 (b) | 732.0 (μb) | 72.50 (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 :
|