35-Br-81

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 5.996 (b) 6.467 (b) 1.079 3.554 (b) 4.847 (b)
(n,elastic) 3.639 (b) 4.109 (b) 1.129 1.838 (b) 3.168 (b)
(n,inelastic) ( E-thr = 279.4 keV ) 643.0 (mb) 1.657 (b)
(n,2n) ( E-thr = 10.28 MeV ) 1.030 (b) 372.3 (μb)
(n,3n) ( E-thr = 18.27 MeV ) 8.618 (nb)
(n,na) ( E-thr = 6.564 MeV ) 23.29 (μb) 23.45 (nb)
(n,np) ( E-thr = 7.597 MeV ) 6.305 (mb) 2.562 (μb)
(n,nd) ( E-thr = 15.38 MeV ) 49.62e-12 (b)
(n,γ) 2.356 (b) 2.358 (b) 1.001 46.62 (b) 1.004 (mb) 21.49 (mb)
(n,p) ( E-thr = 813.0 keV ) 27.70 (mb) 212.0 (μb)
(n,d) ( E-thr = 5.345 MeV ) 5.396 (mb) 1.162 (μb)
(n,t) ( E-thr = 9.047 MeV ) 1.714 (μb) 2.568 (nb)
(n,He-3) ( E-thr = 11.34 MeV ) 0.000 (b) 315.5e-15 (b)
(n,a) 0.000 (b) 0.000 (b) 48.12 (μb) 3.206 (mb) 2.449 (μb)
MT = 203 ( E-thr = 813.0 keV ) 34.01 (mb) 214.6 (μb)
MT = 204 ( E-thr = 5.345 MeV ) 5.396 (mb) 1.162 (μb)
MT = 205 ( E-thr = 9.047 MeV ) 1.714 (μb) 2.568 (nb)
MT = 206 ( E-thr = 11.34 MeV ) 0.000 (b) 315.5e-15 (b)
MT = 207 0.000 (b) 0.000 (b) 48.12 (μb) 3.229 (mb) 2.472 (μb)

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)
 .