| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 718.9 (b) | 1.079 (kb) | 1.501 | − | 5.964 (b) | 8.084 (b) |
| 2 | (n,elastic) | 3.935 (b) | 4.665 (b) | 1.186 | − | 2.835 (b) | 4.657 (b) |
| 4 | (n,inelastic) | ( E-thr = 8.816 keV ) | 295.2 (mb) | 2.296 (b) | |||
| 16 | (n,2n) | ( E-thr = 6.327 MeV ) | 343.7 (mb) | 2.789 (mb) | |||
| 17 | (n,3n) | ( E-thr = 11.83 MeV ) | 31.63 (mb) | 4.025 (μb) | |||
| 18 | (n,fission) | 3.970 (b) | 5.962 (b) | 1.502 | 10.05 (b) | 2.454 (b) | 1.033 (b) |
| 19 | (n,f) | 3.970 (b) | 5.962 (b) | 1.502 | 9.595 (b) | 1.252 (b) | 1.011 (b) |
| 20 | (n,nf) | ( E-thr = 2.300 MeV ) | 1.124 (b) | 21.70 (mb) | |||
| 21 | (n,2nf) | ( E-thr = 8.500 MeV ) | 77.80 (mb) | 11.19 (μb) | |||
| 37 | (n,4n) | ( E-thr = 18.41 MeV ) | − | 1.965e-12 (b) | |||
| 38 | (n,3nf) | ( E-thr = 14.00 MeV ) | 0.000 (b) | 1.900 (nb) | |||
| 102 | (n,γ) | 711.0 (b) | 1.069 (kb) | 1.503 | 1.133 (kb) | 902.8 (μb) | 94.05 (mb) |
| 456 | νp | 3.410 | − | − | − | 6.406 | − |
| 455 | νd | 8.900e-3 | − | − | − | 6.100e-3 | − |
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These cross sections are calculated from JENDL-4.0 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 :
νp,
νd
: numbers of prompt and delayed neutrons per fission.
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