70-Yb-176

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 11.69 (b) 12.84 (b) 1.098 5.335 (b) 6.698 (b)
(n,elastic) 8.871 (b) 10.02 (b) 1.129 2.620 (b) 4.028 (b)
(n,inelastic) ( E-thr = 82.60 keV ) 537.5 (mb) 2.633 (b)
(n,2n) ( E-thr = 6.904 MeV ) 2.106 (b) 12.68 (mb)
(n,3n) ( E-thr = 12.76 MeV ) 70.75 (mb) 27.84 (μb)
(n,na) 0.000 (b) 0.000 (b) 0.000 (b) 13.70 (μb) 4.564 (nb)
(n,np) ( E-thr = 8.516 MeV ) 2.924 (μb) 9.470 (nb)
(n,nd) ( E-thr = 12.83 MeV ) 0.000 (b) 11.60e-12 (b)
(n,γ) 2.823 (b) 2.824 (b) 1.000 6.976 (b) 725.4 (μb) 23.65 (mb)
(n,p) ( E-thr = 3.357 MeV ) 1.393 (mb) 350.8 (nb)
(n,d) ( E-thr = 6.279 MeV ) 66.32 (μb) 32.38 (nb)
(n,t) ( E-thr = 6.540 MeV ) 7.895 (μb) 5.794 (nb)
(n,He-3) ( E-thr = 8.453 MeV ) 0.000 (b) 789.8e-18 (b)
(n,a) 0.000 (b) 0.000 (b) 1.115 (μb) 204.4 (μb) 91.15 (nb)
MT = 203 ( E-thr = 3.357 MeV ) 1.396 (mb) 360.3 (nb)
MT = 204 ( E-thr = 6.279 MeV ) 66.32 (μb) 32.39 (nb)
MT = 205 ( E-thr = 6.540 MeV ) 7.895 (μb) 5.794 (nb)
MT = 206 ( E-thr = 8.453 MeV ) 0.000 (b) 789.8e-18 (b)
MT = 207 0.000 (b) 0.000 (b) 1.115 (μb) 218.1 (μb) 95.71 (nb)

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)
 .