28-Ni-64

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 1.515 (b) 1.521 (b) 1.004 2.760 (b) 3.805 (b)
(n,elastic) 34.87 (mb) 39.37 (mb) 1.129 1.228 (b) 3.254 (b)
(n,inelastic) ( E-thr = 1.367 MeV ) 498.6 (mb) 547.5 (mb)
(n,2n) ( E-thr = 9.809 MeV ) 1.021 (b) 506.9 (μb)
(n,3n) ( E-thr = 16.76 MeV ) 63.67 (nb)
(n,na) ( E-thr = 8.214 MeV ) 43.84 (μb) 99.89 (nb)
(n,np) ( E-thr = 12.74 MeV ) 551.1 (nb) 78.49 (nb)
(n,γ) 1.480 (b) 1.481 (b) 1.001 817.5 (mb) 6.312 (μb) 2.777 (mb)
(n,p) ( E-thr = 6.628 MeV ) 9.136 (mb) 2.825 (μb)
(n,d) ( E-thr = 10.48 MeV ) 89.83 (μb) 41.00 (nb)
(n,t) ( E-thr = 12.67 MeV ) 234.3e-12 (b) 361.0e-12 (b)
(n,He-3) ( E-thr = 15.27 MeV ) 1.078e-15 (b)
(n,a) ( E-thr = 2.480 MeV ) 5.601 (mb) 2.231 (μb)
MT = 203 ( E-thr = 6.628 MeV ) 9.136 (mb) 2.904 (μb)
MT = 204 ( E-thr = 10.48 MeV ) 89.83 (μb) 41.00 (nb)
MT = 205 ( E-thr = 12.67 MeV ) 234.3e-12 (b) 361.0e-12 (b)
MT = 206 ( E-thr = 15.27 MeV ) 1.078e-15 (b)
MT = 207 ( E-thr = 2.480 MeV ) 5.644 (mb) 2.331 (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)
 .