| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 16.55 (b) | 17.02 (b) | 1.029 | − | 4.971 (b) | 6.043 (b) |
| 2 | (n,elastic) | 3.513 (b) | 3.964 (b) | 1.128 | − | 2.940 (b) | 4.526 (b) |
| 4 | (n,inelastic) | ( E-thr = 50.37 keV ) | 252.6 (mb) | 1.486 (b) | |||
| 16 | (n,2n) | ( E-thr = 6.819 MeV ) | 1.772 (b) | 9.198 (mb) | |||
| 17 | (n,3n) | ( E-thr = 15.72 MeV ) | − | 1.281 (μb) | |||
| 22 | (n,na) | ( E-thr = 3.097 MeV ) | 48.08 (μb) | 22.77 (nb) | |||
| 28 | (n,np) | ( E-thr = 7.199 MeV ) | 601.0 (μb) | 152.4 (nb) | |||
| 32 | (n,nd) | ( E-thr = 11.38 MeV ) | 367.8e-18 (b) | 5.580 (nb) | |||
| 33 | (n,nt) | ( E-thr = 13.75 MeV ) | 0.000 (b) | 18.17e-12 (b) | |||
| 102 | (n,γ) | 13.01 (b) | 13.01 (b) | 1.000 | 57.37 (b) | 1.000 (mb) | 19.08 (mb) |
| 103 | (n,p) | 0.000 (b) | 0.000 (b) | − | 25.80 (μb) | 1.825 (mb) | 1.457 (μb) |
| 104 | (n,d) | ( E-thr = 4.871 MeV ) | 1.462 (mb) | 326.1 (nb) | |||
| 105 | (n,t) | ( E-thr = 5.145 MeV ) | 126.9 (μb) | 46.98 (nb) | |||
| 107 | (n,a) | 0.000 (b) | 0.000 (b) | − | 7.610 (μb) | 900.4 (μb) | 513.9 (nb) |
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These cross sections are calculated from JENDL-3.3 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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