| MT | Reaction | 0.0253-eV | Maxwellian Average |
g-factor | Resonance Integral |
14-MeV | Fiss. Spec. Average |
|---|---|---|---|---|---|---|---|
| 1 | (n,total) | 2.672 (b) | 2.698 (b) | 1.010 | − | 2.611 (b) | 3.920 (b) |
| 2 | (n,elastic) | 204.0 (mb) | 230.1 (mb) | 1.128 | − | 1.248 (b) | 2.738 (b) |
| 4 | (n,inelastic) | ( E-thr = 14.66 keV ) | 377.5 (mb) | 1.178 (b) | |||
| 16 | (n,2n) | ( E-thr = 7.782 MeV ) | 943.4 (mb) | 1.618 (mb) | |||
| 22 | (n,na) | ( E-thr = 7.455 MeV ) | 284.4 (μb) | 109.6 (nb) | |||
| 28 | (n,np) | ( E-thr = 10.75 MeV ) | 1.837 (mb) | 612.7 (nb) | |||
| 102 | (n,γ) | 2.463 (b) | 2.463 (b) | 1.000 | 1.423 (b) | 6.785 (μb) | 1.114 (mb) |
| 103 | (n,p) | ( E-thr = 1.813 MeV ) | 29.74 (mb) | 497.1 (μb) | |||
| 107 | (n,a) | 0.000 (b) | 0.000 (b) | − | 4.727 (mb) | 10.64 (mb) | 563.1 (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 :
|