76-Os-187

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 327.5 (b) 323.6 (b) 0.988 5.130 (b) 6.798 (b)
elastic 7.821 (b) 8.717 (b) 1.115 2.598 (b) 3.821 (b)
inelastic ( E-thr = 9.799 keV ) 371.7 (mb) 2.852 (b)
(n,2n) ( E-thr = 6.324 MeV ) 2.145 (b) 16.43 (mb)
(n,3n) ( E-thr = 14.63 MeV ) 5.149 (μb)
(n,na) 1.292e-30 (b) 1.313e-30 (b) 0.000 4.051 (μb) 427.5 (μb) 282.4 (nb)
(n,2na) ( E-thr = 3.486 MeV ) 6.788 (μb) 1.816 (nb)
(n,np) ( E-thr = 6.612 MeV ) 88.42 (μb) 49.09 (nb)
(n,nd) ( E-thr = 10.59 MeV ) 8.939e-12 (b) 121.1e-12 (b)
(n,nt) ( E-thr = 12.01 MeV ) 275.1e-24 (b) 1.750e-12 (b)
(n,n He-3) ( E-thr = 12.83 MeV ) 2.319e-24 (b) 5.309e-12 (b)
capture 319.7 (b) 314.9 (b) 0.985 542.1 (b) 1.050 (mb) 106.9 (mb)
(n,p) 0.000 (b) 0.000 (b) 64.37 (μb) 7.688 (mb) 4.269 (μb)
(n,d) ( E-thr = 4.376 MeV ) 648.3 (μb) 136.4 (nb)
(n,t) ( E-thr = 4.298 MeV ) 19.67 (μb) 6.006 (nb)
(n,He-3) ( E-thr = 4.714 MeV ) 760.4e-15 (b) 91.16e-15 (b)
(n,a) 50.55 (μb) 50.60 (μb) 1.001 2.629 (mb) 5.860 (mb) 13.56 (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)
 .