53-I-131

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 83.67 (b) 84.17 (b) 1.006 4.974 (b) 5.881 (b)
elastic 3.615 (b) 4.081 (b) 1.129 3.091 (b) 4.583 (b)
inelastic ( E-thr = 150.9 keV ) 211.4 (mb) 1.264 (b)
(n,2n) ( E-thr = 8.697 MeV ) 1.670 (b) 2.105 (mb)
(n,3n) ( E-thr = 15.21 MeV ) 2.323 (μb)
(n,na) ( E-thr = 3.193 MeV ) 6.376 (μb) 4.801 (nb)
(n,np) ( E-thr = 7.454 MeV ) 396.4 (μb) 114.0 (nb)
(n,nd) ( E-thr = 13.61 MeV ) 0.000 (b) 102.9e-12 (b)
(n,nt) ( E-thr = 13.51 MeV ) 0.000 (b) 27.81e-12 (b)
capture 80.03 (b) 80.07 (b) 1.001 77.81 (b) 1.001 (mb) 31.49 (mb)
(n,p) ( E-thr = 1.479 MeV ) 1.638 (mb) 674.0 (nb)
(n,d) ( E-thr = 5.126 MeV ) 211.9 (μb) 86.33 (nb)
(n,t) ( E-thr = 7.375 MeV ) 4.455 (μb) 13.26 (nb)
(n,a) 0.000 (b) 0.000 (b) 2.627 (μb) 858.1 (μb) 301.6 (nb)

These cross sections are calculated from JENDL-4.0 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).

Maxwellian Average :
σmacs(T) =
2
 
 
π
EU
 
EL
σ(E,T) ⋅ E ⋅ exp (
E
  
kBT
) dE
 
EU
 
EL
E ⋅ exp (
E
  
kBT
) dE
,
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 :
σri(T) =
EU
 
EL
σ(E,T) ⋅
1
 
E
dE ,
with  EL = 0.5 eV  and  EU = 10 MeV.
U-235 Thermal Fission-Neutron Spectrum Average (Fiss. Spec. Average) :
σfacs(T) =
EU
 
EL
σ(E,T) ⋅
 
4
 
πa3b
⋅ exp (
ab E
     
4 a
) ⋅ sinh
 
bE
dE
 
EU
 
EL
 
4
 
πa3b
⋅ exp (
ab E
     
4 a
) ⋅ sinh
 
bE
dE
,
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 :
g(T) =
σmacs(T)
 
σ(0.0253 eV,T)
 .