28-Ni-58

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 29.64 (b) 32.88 (b) 1.109 2.760 (b) 3.660 (b)
(n,elastic) 25.02 (b) 28.25 (b) 1.129 1.338 (b) 3.212 (b)
(n,inelastic) ( E-thr = 1.480 MeV ) 296.6 (mb) 324.9 (mb)
(n,2n) ( E-thr = 12.41 MeV ) 30.65 (mb) 3.743 (μb)
(n,na) ( E-thr = 6.509 MeV ) 3.477 (mb) 1.066 (μb)
(n,np) ( E-thr = 8.313 MeV ) 635.6 (mb) 201.4 (μb)
(n,γ) 4.621 (b) 4.624 (b) 1.000 2.214 (b) 54.00 (μb) 8.700 (mb)
(n,p) 0.000 (b) 0.000 (b) 616.2 (mb) 329.8 (mb) 107.2 (mb)
(n,d) ( E-thr = 6.050 MeV ) 8.181 (mb) 4.140 (μb)
(n,t) ( E-thr = 11.26 MeV ) 1.635 (μb) 2.554 (nb)
(n,He-3) ( E-thr = 6.593 MeV ) 25.02 (μb) 5.675 (nb)
(n,a) 0.000 (b) 0.000 (b) 58.54 (mb) 105.8 (mb) 6.977 (mb)
(n,2p) ( E-thr = 6.671 MeV ) 11.80 (mb) 2.174 (μb)
MT = 203 0.000 (b) 0.000 (b) 616.4 (mb) 989.0 (mb) 107.4 (mb)
MT = 204 ( E-thr = 6.050 MeV ) 8.181 (mb) 4.140 (μb)
MT = 205 ( E-thr = 11.26 MeV ) 1.635 (μb) 2.554 (nb)
MT = 206 ( E-thr = 6.593 MeV ) 25.02 (μb) 5.675 (nb)
MT = 207 0.000 (b) 0.000 (b) 58.54 (mb) 109.3 (mb) 6.978 (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)
 .