| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 6.044 (b) | 6.819 (b) | 1.128 | − | 4.338 (b) | 5.664 (b) |
| 2 | (n,elastic) | 6.031 (b) | 6.805 (b) | 1.128 | − | 2.553 (b) | 4.625 (b) |
| 4 | (n,inelastic) | ( E-thr = 880.5 keV ) | 576.2 (mb) | 999.9 (mb) | |||
| 16 | (n,2n) | ( E-thr = 9.776 MeV ) | 1.113 (b) | 568.2 (μb) | |||
| 17 | (n,3n) | ( E-thr = 17.94 MeV ) | − | 10.67 (nb) | |||
| 22 | (n,na) | ( E-thr = 2.094 MeV ) | 5.861 (mb) | 10.03 (μb) | |||
| 28 | (n,np) | ( E-thr = 8.583 MeV ) | 16.42 (mb) | 3.265 (μb) | |||
| 102 | (n,γ) | 13.11 (mb) | 13.11 (mb) | 1.000 | 1.400 (b) | 1.008 (mb) | 35.39 (mb) |
| 103 | (n,p) | ( E-thr = 1.276 MeV ) | 53.41 (mb) | 325.1 (μb) | |||
| 104 | (n,d) | ( E-thr = 6.253 MeV ) | 1.024 (mb) | 219.0 (nb) | |||
| 105 | (n,t) | ( E-thr = 8.934 MeV ) | 15.22 (μb) | 10.76 (nb) | |||
| 106 | (n,He-3) | ( E-thr = 6.885 MeV ) | 643.1e-12 (b) | 59.72e-12 (b) | |||
| 107 | (n,a) | 0.000 (b) | 0.000 (b) | − | 7.488 (mb) | 17.51 (mb) | 924.1 (μb) |
| 111 | (n,2p) | ( E-thr = 7.891 MeV ) | 6.306 (nb) | 25.95e-12 (b) | |||
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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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