94-Pu-237

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 2.507 (kb) 2.518 (kb) 1.004 5.911 (b) 7.879 (b)
elastic 11.12 (b) 12.56 (b) 1.129 2.826 (b) 4.437 (b)
inelastic ( E-thr = 47.91 keV ) 331.9 (mb) 938.5 (mb)
(n,2n) ( E-thr = 5.906 MeV ) 151.1 (mb) 1.319 (mb)
(n,3n) ( E-thr = 13.29 MeV ) 5.397 (μb) 49.83 (nb)
fission 2.296 (kb) 2.302 (kb) 1.003 1.231 (kb) 2.599 (b) 2.432 (b)
(n,fission) 2.296 (kb) 2.302 (kb) 1.003 1.230 (kb) 1.944 (b) 2.423 (b)
(n,n,fiss) ( E-thr = 2.000 MeV ) 580.8 (mb) 9.028 (mb)
(n,2n,fiss) ( E-thr = 6.500 MeV ) 73.90 (mb) 12.62 (μb)
(n,3nfiss) ( E-thr = 15.00 MeV ) 6.168e-12 (b)
capture 200.1 (b) 200.1 (b) 1.000 112.9 (b) 848.7 (μb) 69.34 (mb)
 
νp 2.863 4.585
νd 2.000e-3 1.400e-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.