34-Se-76

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 103.5 (b) 105.9 (b) 1.023 3.841 (b) 4.942 (b)
2 (n,elastic) 18.52 (b) 20.90 (b) 1.128 2.550 (b) 3.902 (b)
4 (n,inelastic) ( E-thr = 566.5 keV ) 349.9 (mb) 1.020 (b)
16 (n,2n) ( E-thr = 11.31 MeV ) 824.9 (mb) 154.6 (μb)
17 (n,3n) ( E-thr = 19.45 MeV ) 226.3e-12 (b)
22 (n,na) ( E-thr = 5.166 MeV ) 12.87 (mb) 3.775 (μb)
28 (n,np) ( E-thr = 9.645 MeV ) 11.20 (mb) 1.982 (μb)
102 (n,γ) 85.02 (b) 85.02 (b) 1.000 41.01 (b) 1.023 (mb) 17.46 (mb)
103 (n,p) ( E-thr = 2.215 MeV ) 73.36 (mb) 606.4 (μb)
104 (n,d) ( E-thr = 7.305 MeV ) 146.2 (μb) 57.84 (nb)
105 (n,t) ( E-thr = 11.42 MeV ) 13.03 (nb) 1.541 (nb)
106 (n,He-3) ( E-thr = 8.808 MeV ) 480.7e-12 (b) 3.999e-12 (b)
107 (n,a) 0.000 (b) 0.000 (b) 5.789 (mb) 17.19 (mb) 253.0 (μb)
111 (n,2p) ( E-thr = 10.05 MeV ) 822.1e-12 (b) 175.8e-12 (b)

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)
 .