| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 28.65 (b) | 30.25 (b) | 1.056 | − | 5.941 (b) | 8.009 (b) |
| 2 | (n,elastic) | 12.39 (b) | 13.97 (b) | 1.128 | − | 2.195 (b) | 4.640 (b) |
| 4 | (n,inelastic) | ( E-thr = 43.14 keV ) | 398.3 (mb) | 1.514 (b) | |||
| 16 | (n,2n) | ( E-thr = 6.829 MeV ) | 407.1 (mb) | 2.191 (mb) | |||
| 17 | (n,3n) | ( E-thr = 12.55 MeV ) | 11.99 (mb) | 2.228 (μb) | |||
| 18 | (n,fission) | 1.022 (b) | 1.019 (b) | 0.997 | 13.34 (b) | 2.920 (b) | 1.733 (b) |
| 19 | (n,f) | 1.022 (b) | 1.019 (b) | 0.997 | 12.80 (b) | 1.219 (b) | 1.707 (b) |
| 20 | (n,nf) | ( E-thr = 1.110 MeV ) | 1.662 (b) | 26.13 (mb) | |||
| 21 | (n,2nf) | ( E-thr = 9.500 MeV ) | 41.58 (mb) | 8.396 (μb) | |||
| 38 | (n,3nf) | ( E-thr = 17.50 MeV ) | − | 1.243 (nb) | |||
| 102 | (n,γ) | 15.24 (b) | 15.25 (b) | 1.001 | 625.8 (b) | 1.154 (mb) | 115.9 (mb) |
| 456 | νp | 3.000 | − | − | − | 5.148 | − |
| 455 | νd | 4.451e-3 | − | − | − | 3.629e-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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