| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 5.355 (b) | 5.946 (b) | 1.110 | − | 4.270 (b) | 5.646 (b) |
| 2 | (n,elastic) | 4.569 (b) | 5.158 (b) | 1.129 | − | 2.353 (b) | 4.384 (b) |
| 4 | (n,inelastic) | ( E-thr = 638.9 keV ) | 576.4 (mb) | 1.153 (b) | |||
| 16 | (n,2n) | ( E-thr = 10.44 MeV ) | 1.212 (b) | 393.1 (μb) | |||
| 17 | (n,3n) | ( E-thr = 18.43 MeV ) | − | 3.459 (nb) | |||
| 22 | (n,na) | ( E-thr = 2.309 MeV ) | 2.312 (mb) | 1.039 (μb) | |||
| 28 | (n,np) | ( E-thr = 8.216 MeV ) | 18.50 (mb) | 3.758 (μb) | |||
| 32 | (n,nd) | ( E-thr = 15.60 MeV ) | − | 2.773e-12 (b) | |||
| 102 | (n,γ) | 786.8 (mb) | 787.2 (mb) | 1.001 | 25.31 (b) | 1.511 (mb) | 108.4 (mb) |
| 103 | (n,p) | ( E-thr = 876.3 keV ) | 79.05 (mb) | 341.5 (μb) | |||
| 104 | (n,d) | ( E-thr = 5.970 MeV ) | 6.800 (mb) | 1.348 (μb) | |||
| 105 | (n,t) | ( E-thr = 9.279 MeV ) | 4.757 (μb) | 14.53 (nb) | |||
| 106 | (n,He-3) | ( E-thr = 6.268 MeV ) | 403.4e-12 (b) | 17.78e-12 (b) | |||
| 107 | (n,a) | 0.000 (b) | 0.000 (b) | − | 1.574 (mb) | 23.91 (mb) | 108.0 (μb) |
|
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 :
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