| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 47.62 (b) | 49.04 (b) | 1.030 | − | 5.523 (b) | 7.810 (b) |
| 2 | (n,elastic) | 10.52 (b) | 11.88 (b) | 1.129 | − | 2.643 (b) | 4.697 (b) |
| 4 | (n,inelastic) | ( E-thr = 31.27 keV ) | 73.67 (mb) | 1.453 (b) | |||
| 16 | (n,2n) | ( E-thr = 6.253 MeV ) | 143.0 (mb) | 3.666 (mb) | |||
| 17 | (n,3n) | ( E-thr = 11.76 MeV ) | 246.3 (mb) | 36.09 (μb) | |||
| 18 | (n,fission) | 0.000 (b) | 0.000 (b) | − | 5.423 (b) | 2.420 (b) | 1.458 (b) |
| 102 | (n,γ) | 37.01 (b) | 37.01 (b) | 1.000 | 445.1 (b) | 10.00 (μb) | 194.2 (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 :
|