34-Se-82

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 5.076 (b) 5.725 (b) 1.128 3.569 (b) 4.777 (b)
(n,elastic) 5.031 (b) 5.681 (b) 1.129 1.870 (b) 3.760 (b)
(n,inelastic) ( E-thr = 662.8 keV ) 410.8 (mb) 1.015 (b)
(n,2n) ( E-thr = 9.390 MeV ) 1.284 (b) 929.8 (μb)
(n,3n) ( E-thr = 16.17 MeV ) 231.0 (nb)
(n,na) ( E-thr = 8.257 MeV ) 0.000 (b) 408.2e-12 (b)
(n,np) ( E-thr = 12.50 MeV ) 0.000 (b) 7.838 (nb)
(n,γ) 44.21 (mb) 44.24 (mb) 1.000 709.8 (mb) 665.3 (μb) 1.578 (mb)
(n,p) ( E-thr = 6.568 MeV ) 3.103 (mb) 814.2 (nb)
(n,d) ( E-thr = 10.25 MeV ) 538.8 (nb) 31.61 (nb)
(n,t) ( E-thr = 12.46 MeV ) 0.000 (b) 72.63e-12 (b)
(n,He-3) ( E-thr = 15.12 MeV ) 94.18e-21 (b)
(n,a) ( E-thr = 2.489 MeV ) 42.70 (μb) 20.67 (nb)
MT = 203 ( E-thr = 6.568 MeV ) 3.103 (mb) 822.0 (nb)
MT = 204 ( E-thr = 10.25 MeV ) 538.8 (nb) 31.61 (nb)
MT = 205 ( E-thr = 12.46 MeV ) 0.000 (b) 72.63e-12 (b)
MT = 206 ( E-thr = 15.12 MeV ) 94.18e-21 (b)
MT = 207 ( E-thr = 2.489 MeV ) 42.70 (μb) 21.08 (nb)

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)
 .