56-Ba-137

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 7.497 (b) 7.998 (b) 1.067 5.078 (b) 6.266 (b)
elastic 3.896 (b) 4.397 (b) 1.129 2.909 (b) 5.385 (b)
inelastic ( E-thr = 281.3 keV ) 462.1 (mb) 855.9 (mb)
(n,2n) ( E-thr = 6.954 MeV ) 1.701 (b) 7.103 (mb)
(n,3n) ( E-thr = 16.13 MeV ) 720.0 (nb)
(n,na) ( E-thr = 2.511 MeV ) 25.31 (μb) 12.63 (nb)
(n,np) ( E-thr = 8.733 MeV ) 21.63 (μb) 34.90 (nb)
(n,nd) ( E-thr = 13.22 MeV ) 0.000 (b) 199.8e-12 (b)
capture 3.601 (b) 3.600 (b) 1.000 4.257 (b) 1.000 (mb) 14.73 (mb)
(n,p) ( E-thr = 393.4 keV ) 2.828 (mb) 1.926 (μb)
(n,d) ( E-thr = 6.405 MeV ) 719.2 (μb) 178.7 (nb)
(n,t) ( E-thr = 6.994 MeV ) 26.12 (μb) 19.10 (nb)
(n,a) 0.000 (b) 0.000 (b) 16.13 (μb) 1.309 (mb) 1.535 (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)
 .