94-Pu-244

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 12.10 (b) 13.43 (b) 1.110 6.005 (b) 7.982 (b)
elastic 10.39 (b) 11.73 (b) 1.129 2.645 (b) 4.801 (b)
inelastic ( E-thr = 44.38 keV ) 465.7 (mb) 2.071 (b)
(n,2n) ( E-thr = 6.046 MeV ) 823.8 (mb) 12.58 (mb)
(n,3n) ( E-thr = 11.10 MeV ) 278.1 (mb) 43.38 (μb)
fission 1.715 (mb) 1.711 (mb) 0.997 3.695 (b) 1.786 (b) 1.038 (b)
(n,fission) 1.715 (mb) 1.711 (mb) 0.997 3.161 (b) 549.6 (mb) 1.005 (b)
(n,n,fiss) ( E-thr = 1.000 MeV ) 971.2 (mb) 32.79 (mb)
(n,2n,fiss) ( E-thr = 8.000 MeV ) 265.2 (mb) 35.92 (μb)
(n,4n) ( E-thr = 17.44 MeV ) 4.064 (nb)
(n,3nfiss) ( E-thr = 13.00 MeV ) 6.608e-12 (b) 45.01 (nb)
capture 1.710 (b) 1.706 (b) 0.997 47.83 (b) 1.002 (mb) 55.33 (mb)
 
νp 2.790 5.072
νd 3.000e-2 1.900e-2

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.