| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 2.357 (kb) | 2.225 (kb) | 0.944 | − | 5.814 (b) | 7.810 (b) |
| 2 | (n,elastic) | 11.61 (b) | 13.01 (b) | 1.120 | − | 2.772 (b) | 4.700 (b) |
| 4 | (n,inelastic) | ( E-thr = 55.03 keV ) | 973.4 (μb) | 1.291 (b) | |||
| 16 | (n,2n) | ( E-thr = 5.543 MeV ) | 359.5 (mb) | 17.92 (mb) | |||
| 17 | (n,3n) | ( E-thr = 12.37 MeV ) | 141.4 (mb) | 20.44 (μb) | |||
| 18 | (n,fission) | 1.999 (kb) | 1.888 (kb) | 0.944 | 797.1 (b) | 2.540 (b) | 1.735 (b) |
| 37 | (n,4n) | ( E-thr = 18.09 MeV ) | − | 9.381 (nb) | |||
| 102 | (n,γ) | 346.1 (b) | 324.0 (b) | 0.936 | 109.8 (b) | 254.4e-12 (b) | 65.13 (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 :
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