34-Se-80

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 7.605 (b) 8.508 (b) 1.119 3.496 (b) 4.943 (b)
(n,elastic) 6.995 (b) 7.897 (b) 1.129 1.740 (b) 3.803 (b)
(n,inelastic) ( E-thr = 674.6 keV ) 591.2 (mb) 1.134 (b)
(n,2n) ( E-thr = 10.04 MeV ) 1.149 (b) 574.0 (μb)
(n,3n) ( E-thr = 17.09 MeV ) 55.09 (nb)
(n,na) ( E-thr = 7.060 MeV ) 3.710 (μb) 11.06 (nb)
(n,np) ( E-thr = 11.56 MeV ) 5.931 (μb) 41.31 (nb)
(n,γ) 610.2 (mb) 610.5 (mb) 1.000 959.5 (mb) 766.0 (μb) 5.573 (mb)
(n,p) ( E-thr = 4.879 MeV ) 12.45 (mb) 5.479 (μb)
(n,d) ( E-thr = 9.304 MeV ) 694.7 (μb) 189.0 (nb)
(n,t) ( E-thr = 11.97 MeV ) 16.48e-12 (b) 1.307 (nb)
(n,He-3) ( E-thr = 12.92 MeV ) 0.000 (b) 70.19e-18 (b)
(n,a) ( E-thr = 910.9 keV ) 1.354 (mb) 734.5 (nb)
MT = 203 ( E-thr = 4.879 MeV ) 12.46 (mb) 5.520 (μb)
MT = 204 ( E-thr = 9.304 MeV ) 694.7 (μb) 189.0 (nb)
MT = 205 ( E-thr = 11.97 MeV ) 16.48e-12 (b) 1.307 (nb)
MT = 206 ( E-thr = 12.92 MeV ) 0.000 (b) 70.19e-18 (b)
MT = 207 ( E-thr = 910.9 keV ) 1.358 (mb) 745.6 (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)
 .