| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 18.27 (b) | 18.57 (b) | 1.016 | − | 2.348 (b) | 3.648 (b) |
| 2 | (n,elastic) | 2.340 (b) | 2.640 (b) | 1.128 | − | 1.124 (b) | 3.003 (b) |
| 4 | (n,inelastic) | ( E-thr = 799.1 keV ) | 653.7 (mb) | 591.5 (mb) | |||
| 16 | (n,2n) | ( E-thr = 13.20 MeV ) | 8.200 (mb) | 1.805 (μb) | |||
| 22 | (n,na) | ( E-thr = 8.728 MeV ) | 565.9 (μb) | 172.0 (nb) | |||
| 28 | (n,np) | ( E-thr = 9.782 MeV ) | 260.5 (mb) | 48.78 (μb) | |||
| 102 | (n,γ) | 15.93 (b) | 15.93 (b) | 1.000 | 7.383 (b) | 152.4 (μb) | 6.347 (mb) |
| 103 | (n,p) | ( E-thr = 261.7 keV ) | 218.8 (mb) | 47.12 (mb) | |||
| 107 | (n,a) | 0.000 (b) | 0.000 (b) | − | 15.46 (mb) | 81.83 (mb) | 601.0 (μb) |
|
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 :
|