56-Ba-138

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 6.445 (b) 7.225 (b) 1.121 5.078 (b) 6.263 (b)
elastic 6.041 (b) 6.821 (b) 1.129 2.889 (b) 5.594 (b)
inelastic ( E-thr = 1.446 MeV ) 452.8 (mb) 663.3 (mb)
(n,2n) ( E-thr = 8.679 MeV ) 1.731 (b) 1.762 (mb)
(n,3n) ( E-thr = 15.63 MeV ) 2.356 (μb)
(n,na) ( E-thr = 2.589 MeV ) 132.0 (μb) 41.84 (nb)
(n,np) ( E-thr = 9.073 MeV ) 969.1 (nb) 9.944 (nb)
capture 404.4 (mb) 404.6 (mb) 1.001 283.5 (mb) 1.350 (mb) 2.984 (mb)
(n,p) ( E-thr = 4.755 MeV ) 1.981 (mb) 412.7 (nb)
(n,d) ( E-thr = 6.746 MeV ) 57.63 (μb) 31.96 (nb)
(n,t) ( E-thr = 8.854 MeV ) 240.3 (nb) 3.652 (nb)
(n,a) 0.000 (b) 0.000 (b) 15.61 (μb) 1.679 (mb) 976.0 (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)
 .