34-Se-77

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 49.47 (b) 50.56 (b) 1.022 3.426 (b) 4.795 (b)
(n,elastic) 8.460 (b) 9.549 (b) 1.129 1.637 (b) 2.725 (b)
(n,inelastic) ( E-thr = 164.0 keV ) 480.3 (mb) 2.036 (b)
(n,2n) ( E-thr = 7.516 MeV ) 1.262 (b) 2.898 (mb)
(n,3n) ( E-thr = 18.82 MeV ) 2.911 (nb)
(n,na) ( E-thr = 5.802 MeV ) 292.8 (μb) 81.90 (nb)
(n,np) ( E-thr = 9.725 MeV ) 2.208 (mb) 506.1 (nb)
(n,nd) ( E-thr = 14.90 MeV ) 121.2e-12 (b)
(n,γ) 41.01 (b) 41.01 (b) 1.000 31.26 (b) 1.269 (mb) 28.44 (mb)
(n,p) 0.000 (b) 0.000 (b) 8.847 (mb) 35.22 (mb) 1.211 (mb)
(n,d) ( E-thr = 7.471 MeV ) 2.683 (mb) 532.8 (nb)
(n,t) ( E-thr = 8.556 MeV ) 1.768 (μb) 1.169 (nb)
(n,He-3) ( E-thr = 9.729 MeV ) 5.599e-12 (b) 4.427e-12 (b)
(n,a) 0.000 (b) 0.000 (b) 1.249 (mb) 3.085 (mb) 179.6 (μb)
MT = 203 0.000 (b) 0.000 (b) 8.847 (mb) 37.43 (mb) 1.211 (mb)
MT = 204 ( E-thr = 7.471 MeV ) 2.683 (mb) 533.0 (nb)
MT = 205 ( E-thr = 8.556 MeV ) 1.768 (μb) 1.169 (nb)
MT = 206 ( E-thr = 9.729 MeV ) 5.599e-12 (b) 4.427e-12 (b)
MT = 207 0.000 (b) 0.000 (b) 1.249 (mb) 3.378 (mb) 179.7 (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)
 .