34-Se-74

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 59.14 (b) 60.11 (b) 1.016 3.840 (b) 4.941 (b)
2 (n,elastic) 7.325 (b) 8.258 (b) 1.127 2.391 (b) 3.878 (b)
4 (n,inelastic) ( E-thr = 643.5 keV ) 498.4 (mb) 1.002 (b)
16 (n,2n) ( E-thr = 12.24 MeV ) 271.8 (mb) 34.44 (μb)
22 (n,na) ( E-thr = 4.129 MeV ) 174.3 (mb) 50.20 (μb)
28 (n,np) ( E-thr = 8.674 MeV ) 310.1 (mb) 59.24 (μb)
102 (n,γ) 51.82 (b) 51.85 (b) 1.001 579.8 (b) 1.042 (mb) 38.55 (mb)
103 (n,p) ( E-thr = 578.3 keV ) 151.4 (mb) 17.48 (mb)
104 (n,d) ( E-thr = 6.332 MeV ) 1.240 (mb) 387.4 (nb)
105 (n,t) ( E-thr = 11.00 MeV ) 179.3 (nb) 3.278 (nb)
106 (n,He-3) ( E-thr = 6.574 MeV ) 279.6 (nb) 337.2e-12 (b)
107 (n,a) 0.000 (b) 0.000 (b) 50.82 (mb) 41.42 (mb) 4.225 (mb)
111 (n,2p) ( E-thr = 7.532 MeV ) 12.38 (μb) 5.474 (nb)

These cross sections are calculated from JENDL-3.3 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).

MT is a number that defines a reaction type. For the relation between MT and reaction type, please see here or refer to the manual of ENDF formats.

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)
 .