28-Ni-61

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 11.31 (b) 12.45 (b) 1.101 2.760 (b) 3.817 (b)
(n,elastic) 8.804 (b) 9.941 (b) 1.129 1.277 (b) 2.598 (b)
(n,inelastic) ( E-thr = 68.52 keV ) 426.7 (mb) 1.205 (b)
(n,2n) ( E-thr = 7.950 MeV ) 929.3 (mb) 1.081 (mb)
(n,3n) ( E-thr = 19.53 MeV ) 14.69e-12 (b)
(n,na) ( E-thr = 6.572 MeV ) 3.548 (mb) 783.1 (nb)
(n,np) ( E-thr = 10.02 MeV ) 15.11 (mb) 2.790 (μb)
(n,nd) ( E-thr = 15.38 MeV ) 9.177e-12 (b)
(n,γ) 2.509 (b) 2.511 (b) 1.000 2.435 (b) 18.35 (μb) 5.459 (mb)
(n,p) ( E-thr = 548.6 keV ) 61.35 (mb) 1.551 (mb)
(n,d) ( E-thr = 7.763 MeV ) 2.937 (mb) 611.6 (nb)
(n,t) ( E-thr = 9.018 MeV ) 108.1 (μb) 22.09 (nb)
(n,He-3) ( E-thr = 10.59 MeV ) 1.152 (nb) 32.83e-12 (b)
(n,a) 0.000 (b) 0.000 (b) 30.00 (mb) 45.88 (mb) 4.045 (mb)
(n,2p) ( E-thr = 9.447 MeV ) 207.3 (nb) 876.7e-12 (b)
MT = 203 ( E-thr = 548.6 keV ) 76.46 (mb) 1.554 (mb)
MT = 204 ( E-thr = 7.763 MeV ) 2.937 (mb) 611.6 (nb)
MT = 205 ( E-thr = 9.018 MeV ) 108.1 (μb) 22.09 (nb)
MT = 206 ( E-thr = 10.59 MeV ) 1.152 (nb) 32.83e-12 (b)
MT = 207 0.000 (b) 0.000 (b) 30.00 (mb) 49.42 (mb) 4.046 (mb)

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)
 .