34-Se-79

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 56.46 (b) 57.40 (b) 1.017 3.493 (b) 4.894 (b)
(n,elastic) 6.342 (b) 7.159 (b) 1.129 1.801 (b) 3.079 (b)
(n,inelastic) ( E-thr = 96.99 keV ) 404.2 (mb) 1.765 (b)
(n,2n) ( E-thr = 7.052 MeV ) 1.263 (b) 3.138 (mb)
(n,3n) ( E-thr = 17.68 MeV ) 31.66 (nb)
(n,na) ( E-thr = 6.569 MeV ) 20.33 (μb) 12.96 (nb)
(n,np) ( E-thr = 10.52 MeV ) 91.20 (μb) 81.54 (nb)
(n,nd) ( E-thr = 15.33 MeV ) 34.15e-12 (b)
(n,γ) 50.02 (b) 50.04 (b) 1.001 108.7 (b) 1.269 (mb) 45.36 (mb)
(n,p) ( E-thr = 1.518 MeV ) 21.88 (mb) 46.55 (μb)
(n,d) ( E-thr = 8.269 MeV ) 1.205 (mb) 221.6 (nb)
(n,t) ( E-thr = 8.993 MeV ) 6.047 (μb) 1.904 (nb)
(n,He-3) ( E-thr = 11.71 MeV ) 0.000 (b) 215.9e-15 (b)
(n,a) 0.000 (b) 0.000 (b) 119.5 (μb) 1.060 (mb) 7.754 (μb)
MT = 203 ( E-thr = 1.518 MeV ) 21.97 (mb) 46.63 (μb)
MT = 204 ( E-thr = 8.269 MeV ) 1.205 (mb) 221.6 (nb)
MT = 205 ( E-thr = 8.993 MeV ) 6.047 (μb) 1.904 (nb)
MT = 206 ( E-thr = 11.71 MeV ) 0.000 (b) 215.9e-15 (b)
MT = 207 0.000 (b) 0.000 (b) 119.5 (μb) 1.080 (mb) 7.767 (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)
 .