72-Hf-179

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 47.51 (b) 48.31 (b) 1.017 5.341 (b) 6.847 (b)
elastic 7.005 (b) 7.884 (b) 1.126 2.727 (b) 4.069 (b)
inelastic ( E-thr = 123.5 keV ) 429.4 (mb) 2.664 (b)
(n,2n) ( E-thr = 6.133 MeV ) 2.176 (b) 15.96 (mb)
(n,3n) ( E-thr = 13.80 MeV ) 0.000 (b) 8.478 (μb)
(n,na) 0.000 (b) 0.000 (b) 0.000 (b) 24.14 (μb) 7.904 (nb)
(n,np) ( E-thr = 7.460 MeV ) 34.49 (μb) 32.97 (nb)
(n,nd) ( E-thr = 11.28 MeV ) 0.000 (b) 90.82e-12 (b)
capture 40.50 (b) 40.43 (b) 0.998 507.2 (b) 1.688 (mb) 97.19 (mb)
(n,p) ( E-thr = 628.9 keV ) 5.231 (mb) 2.321 (μb)
(n,d) ( E-thr = 5.223 MeV ) 519.7 (μb) 118.4 (nb)
(n,t) ( E-thr = 4.989 MeV ) 30.94 (μb) 7.883 (nb)
(n,He-3) ( E-thr = 6.378 MeV ) 0.000 (b) 28.98e-15 (b)
(n,a) 0.000 (b) 0.000 (b) 10.18 (μb) 636.5 (μb) 606.6 (nb)
MT = 203 ( E-thr = 628.9 keV ) 5.265 (mb) 2.354 (μb)
MT = 204 ( E-thr = 5.223 MeV ) 519.7 (μb) 118.5 (nb)
MT = 205 ( E-thr = 4.989 MeV ) 30.94 (μb) 7.883 (nb)
MT = 206 ( E-thr = 6.378 MeV ) 0.000 (b) 28.98e-15 (b)
MT = 207 0.000 (b) 0.000 (b) 10.18 (μb) 660.6 (μb) 614.5 (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)
 .