34-Se-79

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 56.46 (b) 57.37 (b) 1.016 3.841 (b) 4.940 (b)
2 (n,elastic) 6.341 (b) 7.155 (b) 1.128 2.514 (b) 3.565 (b)
4 (n,inelastic) ( E-thr = 96.92 keV ) 94.99 (mb) 1.335 (b)
16 (n,2n) ( E-thr = 7.054 MeV ) 1.213 (b) 6.730 (mb)
17 (n,3n) ( E-thr = 17.69 MeV ) 66.91 (nb)
22 (n,na) ( E-thr = 6.569 MeV ) 57.12 (μb) 32.58 (nb)
28 (n,np) ( E-thr = 10.61 MeV ) 63.23 (μb) 48.01 (nb)
32 (n,nd) ( E-thr = 15.26 MeV ) 75.93e-12 (b)
102 (n,γ) 50.02 (b) 50.02 (b) 1.000 60.81 (b) 1.001 (mb) 29.98 (mb)
103 (n,p) ( E-thr = 1.436 MeV ) 8.637 (mb) 26.08 (μb)
104 (n,d) ( E-thr = 8.268 MeV ) 317.9 (μb) 78.70 (nb)
105 (n,t) ( E-thr = 8.993 MeV ) 1.535 (μb) 5.889 (nb)
106 (n,He-3) ( E-thr = 11.71 MeV ) 0.000 (b) 275.0e-15 (b)
107 (n,a) 0.000 (b) 0.000 (b) 1.019 (mb) 8.553 (mb) 77.05 (μb)

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)
 .