| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 586.6 (b) | 565.1 (b) | 0.963 | − | 6.876 (b) | 8.829 (b) |
| 2 | (n,elastic) | 28.58 (b) | 31.47 (b) | 1.101 | − | 3.584 (b) | 6.013 (b) |
| 4 | (n,inelastic) | ( E-thr = 44.27 keV ) | 1.155 (mb) | 716.6 (mb) | |||
| 16 | (n,2n) | ( E-thr = 7.028 MeV ) | 514.7 (mb) | 3.669 (mb) | |||
| 17 | (n,3n) | ( E-thr = 12.93 MeV ) | 54.45 (mb) | 13.71 (μb) | |||
| 18 | (n,fission) | 17.89 (b) | 17.12 (b) | 0.957 | 30.82 (b) | 2.722 (b) | 1.994 (b) |
| 102 | (n,γ) | 540.2 (b) | 516.5 (b) | 0.956 | 153.6 (b) | 5.861 (nb) | 99.30 (mb) |
|
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 :
|