16-S-34

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 2.333 (b) 2.605 (b) 1.117 1.780 (b) 2.659 (b)
elastic 2.109 (b) 2.381 (b) 1.129 748.0 (mb) 2.529 (b)
inelastic ( E-thr = 2.190 MeV ) 477.0 (mb) 126.4 (mb)
(n,2n) ( E-thr = 11.75 MeV ) 252.8 (mb) 38.34 (μb)
(n,na) ( E-thr = 8.158 MeV ) 131.8 (mb) 84.96 (μb)
(n,np) ( E-thr = 11.20 MeV ) 5.424 (mb) 957.4 (nb)
capture 223.6 (mb) 223.8 (mb) 1.001 100.7 (mb) 3.664 (μb) 275.5 (μb)
(n,p) ( E-thr = 4.445 MeV ) 104.3 (mb) 800.5 (μb)
(n,a) ( E-thr = 1.374 MeV ) 60.42 (mb) 3.331 (mb)

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)
 .