83-Bi-0

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 9.424 (b) 10.64 (b) 1.129 5.365 (b) 6.498 (b)
(n,elastic) 9.390 (b) 10.60 (b) 1.129 2.804 (b) 5.791 (b)
(n,inelastic) ( E-thr = 900.7 keV ) 361.1 (mb) 700.1 (mb)
(n,2n) ( E-thr = 7.497 MeV ) 2.201 (b) 4.502 (mb)
(n,3n) ( E-thr = 14.42 MeV ) 3.776 (μb)
(n,na) 0.000 (b) 0.000 (b) 1.179 (μb) 21.19 (μb) 44.03 (nb)
(n,np) ( E-thr = 3.817 MeV ) 119.1 (μb) 43.14 (nb)
(n,γ) 34.21 (mb) 34.23 (mb) 1.000 171.5 (mb) 756.0 (μb) 2.232 (mb)
(n,p) 0.000 (b) 0.000 (b) 3.754 (μb) 683.6 (μb) 309.2 (nb)
(n,d) ( E-thr = 1.581 MeV ) 527.2 (μb) 246.8 (nb)
(n,a) 0.000 (b) 0.000 (b) 15.12 (μb) 479.2 (μb) 1.035 (μb)
MT = 203 0.000 (b) 0.000 (b) 4.241 (μb) 802.8 (μb) 352.3 (nb)
MT = 204 ( E-thr = 1.581 MeV ) 527.2 (μb) 246.8 (nb)
MT = 207 0.000 (b) 0.000 (b) 16.29 (μb) 500.3 (μb) 1.079 (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)
 .