| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 413.0 (b) | 424.3 (b) | 1.027 | − | 5.811 (b) | 7.512 (b) |
| 2 | (n,elastic) | 11.83 (b) | 13.37 (b) | 1.130 | − | 2.804 (b) | 4.340 (b) |
| 4 | (n,inelastic) | ( E-thr = 160.7 eV ) | 319.6 (mb) | 1.037 (b) | |||
| 16 | (n,2n) | ( E-thr = 7.129 MeV ) | 925.1 (mb) | 1.456 (mb) | |||
| 17 | (n,3n) | ( E-thr = 13.13 MeV ) | 1.640 (mb) | 1.921 (μb) | |||
| 18 | (n,fission) | 1.000 (b) | 1.071 (b) | 1.071 | 20.46 (b) | 1.760 (b) | 1.963 (b) |
| 19 | (n,f) | 1.000 (b) | 1.071 (b) | 1.071 | 20.03 (b) | 850.3 (mb) | 1.946 (b) |
| 20 | (n,nf) | ( E-thr = 2.000 MeV ) | 902.6 (mb) | 17.67 (mb) | |||
| 21 | (n,2nf) | ( E-thr = 10.50 MeV ) | 6.738 (mb) | 6.621 (μb) | |||
| 38 | (n,3nf) | ( E-thr = 15.50 MeV ) | − | 56.32e-12 (b) | |||
| 102 | (n,γ) | 399.9 (b) | 408.5 (b) | 1.021 | 757.3 (b) | 1.159 (mb) | 168.1 (mb) |
| 456 | νp | 2.240 | − | − | − | 3.556 | − |
| 455 | νd | 5.153e-3 | − | − | − | 3.569e-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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