| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 3.813 (b) | 4.181 (b) | 1.097 | − | 4.929 (b) | 6.213 (b) |
| 2 | (n,elastic) | 2.852 (b) | 3.219 (b) | 1.129 | − | 2.777 (b) | 4.832 (b) |
| 4 | (n,inelastic) | ( E-thr = 645.8 keV ) | 263.1 (mb) | 1.367 (b) | |||
| 16 | (n,2n) | ( E-thr = 7.221 MeV ) | 1.847 (b) | 7.923 (mb) | |||
| 17 | (n,3n) | ( E-thr = 12.69 MeV ) | 31.67 (mb) | 11.95 (μb) | |||
| 22 | (n,na) | 0.000 (b) | 0.000 (b) | − | 10.33 (μb) | 1.754 (mb) | 782.2 (nb) |
| 28 | (n,np) | ( E-thr = 8.952 MeV ) | 43.57 (μb) | 47.07 (nb) | |||
| 32 | (n,nd) | ( E-thr = 13.45 MeV ) | 0.000 (b) | 109.4e-12 (b) | |||
| 102 | (n,γ) | 961.2 (mb) | 961.7 (mb) | 1.001 | 892.0 (mb) | 807.3 (μb) | 6.067 (mb) |
| 103 | (n,p) | ( E-thr = 3.748 MeV ) | 4.834 (mb) | 1.392 (μb) | |||
| 104 | (n,d) | ( E-thr = 6.712 MeV ) | 2.577 (mb) | 559.3 (nb) | |||
| 105 | (n,t) | ( E-thr = 7.146 MeV ) | 203.8 (μb) | 71.40 (nb) | |||
| 106 | (n,He-3) | ( E-thr = 8.185 MeV ) | 0.000 (b) | 148.4e-15 (b) | |||
| 107 | (n,a) | 0.000 (b) | 0.000 (b) | − | 127.9 (μb) | 4.719 (mb) | 9.501 (μb) |
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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 :
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