56-Ba-140

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 4.924 (b) 5.354 (b) 1.087 5.074 (b) 6.259 (b)
elastic 3.315 (b) 3.739 (b) 1.128 2.910 (b) 5.280 (b)
inelastic ( E-thr = 606.6 keV ) 115.7 (mb) 958.5 (mb)
(n,2n) ( E-thr = 6.483 MeV ) 1.175 (b) 13.32 (mb)
(n,3n) ( E-thr = 11.24 MeV ) 873.7 (mb) 129.0 (μb)
(n,na) 0.000 (b) 0.000 (b) 5.274 (μb) 1.313 (mb) 516.8 (nb)
(n,np) ( E-thr = 10.02 MeV ) 118.5e-12 (b) 5.429 (nb)
(n,nd) ( E-thr = 13.67 MeV ) 0.000 (b) 102.1e-12 (b)
(n,nt) ( E-thr = 11.76 MeV ) 4.336e-18 (b) 956.9e-12 (b)
capture 1.601 (b) 1.602 (b) 1.001 727.5 (mb) 1.001 (mb) 784.0 (μb)
(n,p) ( E-thr = 5.300 MeV ) 913.3 (μb) 196.3 (nb)
(n,d) ( E-thr = 7.694 MeV ) 15.08 (μb) 34.72 (nb)
(n,t) ( E-thr = 7.443 MeV ) 63.02 (μb) 34.43 (nb)
(n,a) 0.000 (b) 0.000 (b) 9.802 (μb) 666.9 (μb) 585.2 (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)
 .