94-Pu-236

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 176.7 (b) 177.4 (b) 1.004 5.903 (b) 7.919 (b)
elastic 9.200 (b) 10.37 (b) 1.127 2.737 (b) 4.455 (b)
inelastic ( E-thr = 44.82 keV ) 367.9 (mb) 998.7 (mb)
(n,2n) ( E-thr = 7.384 MeV ) 218.9 (mb) 257.7 (μb)
(n,3n) ( E-thr = 13.65 MeV ) 3.283 (μb) 28.67 (nb)
fission 140.0 (b) 139.4 (b) 0.996 971.0 (b) 2.577 (b) 2.359 (b)
(n,fission) 140.0 (b) 139.4 (b) 0.996 970.4 (b) 1.036 (b) 2.330 (b)
(n,n,fiss) ( E-thr = 800.0 keV ) 1.523 (b) 29.28 (mb)
(n,2n,fiss) ( E-thr = 8.500 MeV ) 19.59 (mb) 6.031 (μb)
(n,3nfiss) ( E-thr = 14.50 MeV ) 1.538 (nb)
capture 27.56 (b) 27.61 (b) 1.002 248.0 (b) 1.056 (mb) 104.3 (mb)
 
νp 2.906 4.873
νd 2.248e-3 1.832e-3

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)
 .


νp, νd : numbers of prompt and delayed neutrons per fission.