| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 7.887 (kb) | 7.570 (kb) | 0.960 | − | 5.838 (b) | 8.148 (b) |
| 2 | (n,elastic) | 76.12 (b) | 79.22 (b) | 1.041 | − | 2.754 (b) | 4.814 (b) |
| 4 | (n,inelastic) | ( E-thr = 24.92 keV ) | 10.20 (mb) | 862.9 (mb) | |||
| 16 | (n,2n) | ( E-thr = 5.132 MeV ) | 268.1 (mb) | 12.34 (mb) | |||
| 17 | (n,3n) | ( E-thr = 11.78 MeV ) | 325.2 (mb) | 44.33 (μb) | |||
| 18 | (n,fission) | 4.934 (kb) | 4.732 (kb) | 0.959 | 2.773 (kb) | 2.480 (b) | 2.430 (b) |
| 37 | (n,4n) | ( E-thr = 17.40 MeV ) | − | 59.29 (nb) | |||
| 102 | (n,γ) | 2.877 (kb) | 2.759 (kb) | 0.959 | 1.604 (kb) | 11.11 (nb) | 27.45 (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 :
|