35-Br-81

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 6.330 (b) 6.798 (b) 1.074 3.841 (b) 4.939 (b)
2 (n,elastic) 3.639 (b) 4.107 (b) 1.128 2.508 (b) 3.566 (b)
4 (n,inelastic) ( E-thr = 279.4 keV ) 268.0 (mb) 1.348 (b)
16 (n,2n) ( E-thr = 10.29 MeV ) 1.029 (b) 401.7 (μb)
17 (n,3n) ( E-thr = 18.28 MeV ) 24.54 (nb)
22 (n,na) ( E-thr = 6.563 MeV ) 28.42 (μb) 17.85 (nb)
28 (n,np) ( E-thr = 7.602 MeV ) 9.470 (mb) 3.059 (μb)
32 (n,nd) ( E-thr = 15.30 MeV ) 94.29e-12 (b)
33 (n,nt) ( E-thr = 16.09 MeV ) 2.060e-12 (b)
102 (n,γ) 2.691 (b) 2.691 (b) 1.000 46.63 (b) 1.004 (mb) 22.06 (mb)
103 (n,p) ( E-thr = 812.5 keV ) 20.73 (mb) 225.5 (μb)
104 (n,d) ( E-thr = 5.263 MeV ) 425.1 (μb) 127.5 (nb)
105 (n,t) ( E-thr = 9.041 MeV ) 1.897 (μb) 7.111 (nb)
107 (n,a) 0.000 (b) 0.000 (b) 70.92 (μb) 4.259 (mb) 3.500 (μb)

These cross sections are calculated from JENDL-3.2 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)
 .