76-Os-189

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 40.55 (b) 42.61 (b) 1.051 5.140 (b) 6.723 (b)
elastic 15.55 (b) 17.54 (b) 1.128 2.656 (b) 3.863 (b)
inelastic ( E-thr = 30.98 keV ) 300.7 (mb) 2.776 (b)
(n,2n) ( E-thr = 5.952 MeV ) 2.173 (b) 21.90 (mb)
(n,3n) ( E-thr = 13.98 MeV ) 143.0 (μb) 10.68 (μb)
(n,na) 0.000 (b) 0.000 (b) 297.6 (nb) 128.3 (μb) 51.03 (nb)
(n,2na) ( E-thr = 3.794 MeV ) 700.2 (nb) 197.9e-12 (b)
(n,np) ( E-thr = 7.297 MeV ) 30.93 (μb) 36.59 (nb)
(n,nd) ( E-thr = 10.96 MeV ) 289.7e-15 (b) 68.17e-12 (b)
(n,nt) ( E-thr = 12.07 MeV ) 51.33e-24 (b) 1.479e-12 (b)
(n,n He-3) ( E-thr = 13.20 MeV ) 35.32e-24 (b) 2.016e-12 (b)
capture 25.00 (b) 25.07 (b) 1.002 807.4 (b) 875.6 (μb) 61.33 (mb)
(n,p) ( E-thr = 226.3 keV ) 7.100 (mb) 2.694 (μb)
(n,d) ( E-thr = 5.060 MeV ) 304.5 (μb) 68.16 (nb)
(n,t) ( E-thr = 4.673 MeV ) 9.860 (μb) 3.736 (nb)
(n,He-3) ( E-thr = 5.972 MeV ) 2.265e-15 (b) 9.624e-15 (b)
(n,a) 22.67 (μb) 22.68 (μb) 1.001 755.5 (μb) 2.706 (mb) 2.465 (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)
 .