95-Am-243

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 85.83 (b) 88.20 (b) 1.028 5.599 (b) 7.701 (b)
elastic 6.490 (b) 7.276 (b) 1.121 2.377 (b) 4.581 (b)
inelastic ( E-thr = 42.38 keV ) 357.2 (mb) 1.847 (b)
(n,2n) ( E-thr = 6.391 MeV ) 595.3 (mb) 3.530 (mb)
(n,3n) ( E-thr = 11.95 MeV ) 61.21 (mb) 7.460 (μb)
fission 81.58 (mb) 82.97 (mb) 1.017 6.308 (b) 2.205 (b) 1.081 (b)
(n,fission) 81.58 (mb) 82.97 (mb) 1.017 5.919 (b) 1.255 (b) 1.062 (b)
(n,n,fiss) ( E-thr = 2.300 MeV ) 917.8 (mb) 18.43 (mb)
(n,2n,fiss) ( E-thr = 9.000 MeV ) 34.25 (mb) 7.259 (μb)
(n,4n) ( E-thr = 18.63 MeV ) 525.0e-15 (b)
(n,3nfiss) ( E-thr = 14.50 MeV ) 2.137 (nb)
capture 79.26 (b) 80.83 (b) 1.020 2.040 (kb) 1.196 (mb) 185.9 (mb)
 
νp 3.187 5.374
νd 8.500e-3 7.679e-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.