16-S-36

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 2.367 (b) 2.655 (b) 1.122 1.825 (b) 2.657 (b)
elastic 2.216 (b) 2.502 (b) 1.129 789.6 (mb) 2.581 (b)
inelastic ( E-thr = 3.383 MeV ) 477.1 (mb) 75.75 (mb)
(n,2n) ( E-thr = 10.17 MeV ) 540.1 (mb) 242.7 (μb)
(n,na) ( E-thr = 9.252 MeV ) 8.270 (mb) 2.082 (μb)
(n,np) ( E-thr = 13.41 MeV ) 17.14 (μb) 29.59 (nb)
capture 150.5 (mb) 152.6 (mb) 1.014 121.0 (mb) 1.365 (μb) 251.4 (μb)
(n,p) ( E-thr = 9.243 MeV ) 1.452 (mb) 460.8 (nb)
(n,a) ( E-thr = 4.065 MeV ) 8.735 (mb) 54.12 (μb)

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)
 .