34-Se-74

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 59.14 (b) 60.14 (b) 1.017 3.307 (b) 4.419 (b)
(n,elastic) 7.325 (b) 8.263 (b) 1.128 1.575 (b) 3.252 (b)
(n,inelastic) ( E-thr = 643.4 keV ) 998.5 (mb) 1.097 (b)
(n,2n) ( E-thr = 12.23 MeV ) 310.0 (mb) 38.93 (μb)
(n,na) ( E-thr = 4.130 MeV ) 15.14 (mb) 5.292 (μb)
(n,np) ( E-thr = 8.662 MeV ) 227.7 (mb) 54.04 (μb)
(n,nd) ( E-thr = 17.35 MeV ) 100.8e-15 (b)
(n,γ) 51.82 (b) 51.88 (b) 1.001 580.3 (b) 1.557 (mb) 57.05 (mb)
(n,p) ( E-thr = 578.2 keV ) 148.3 (mb) 11.53 (mb)
(n,d) ( E-thr = 6.407 MeV ) 7.763 (mb) 1.964 (μb)
(n,t) ( E-thr = 11.01 MeV ) 94.76 (nb) 849.9e-12 (b)
(n,He-3) ( E-thr = 6.575 MeV ) 201.4 (nb) 73.99e-12 (b)
(n,a) 0.000 (b) 0.000 (b) 14.24 (mb) 21.95 (mb) 1.167 (mb)
MT = 203 ( E-thr = 578.2 keV ) 376.0 (mb) 11.59 (mb)
MT = 204 ( E-thr = 6.407 MeV ) 7.763 (mb) 1.964 (μb)
MT = 205 ( E-thr = 11.01 MeV ) 94.76 (nb) 849.9e-12 (b)
MT = 206 ( E-thr = 6.575 MeV ) 201.4 (nb) 73.99e-12 (b)
MT = 207 0.000 (b) 0.000 (b) 14.24 (mb) 37.09 (mb) 1.173 (mb)

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)
 .