| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 3.623 (b) | 4.019 (b) | 1.109 | − | 1.716 (b) | 3.208 (b) |
| 2 | (n,elastic) | 3.091 (b) | 3.488 (b) | 1.128 | − | 780.4 (mb) | 2.670 (b) |
| 4 | (n,inelastic) | ( E-thr = 459.2 keV ) | 470.2 (mb) | 535.8 (mb) | |||
| 16 | (n,2n) | ( E-thr = 12.96 MeV ) | 18.00 (mb) | 2.563 (μb) | |||
| 22 | (n,na) | ( E-thr = 10.93 MeV ) | 8.000 (mb) | 2.238 (μb) | |||
| 28 | (n,np) | ( E-thr = 9.179 MeV ) | 262.0 (mb) | 86.01 (μb) | |||
| 102 | (n,γ) | 531.4 (mb) | 531.5 (mb) | 1.000 | 311.4 (mb) | 149.5 (μb) | 225.8 (μb) |
| 103 | (n,p) | ( E-thr = 3.754 MeV ) | 43.67 (mb) | 1.524 (mb) | |||
| 107 | (n,a) | ( E-thr = 4.036 MeV ) | 133.8 (mb) | 601.7 (μb) | |||
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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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