MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
---|---|---|---|---|---|---|---|
1 | (n,total) | 12.06 (b) | 13.38 (b) | 1.110 | − | 5.838 (b) | 7.914 (b) |
2 | (n,elastic) | 10.38 (b) | 11.71 (b) | 1.128 | − | 2.788 (b) | 4.819 (b) |
4 | (n,inelastic) | ( E-thr = 46.19 keV ) | 435.6 (mb) | 1.841 (b) | |||
16 | (n,2n) | ( E-thr = 6.046 MeV ) | 646.9 (mb) | 11.12 (mb) | |||
17 | (n,3n) | ( E-thr = 11.10 MeV ) | 294.5 (mb) | 50.82 (μb) | |||
18 | (n,fission) | 1.686 (mb) | 1.680 (mb) | 0.997 | 3.895 (b) | 1.672 (b) | 1.111 (b) |
102 | (n,γ) | 1.680 (b) | 1.675 (b) | 0.997 | 49.97 (b) | 1.128 (mb) | 131.6 (mb) |
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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