98-Cf-254

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 17.15 (b) 18.58 (b) 1.083 5.870 (b) 8.259 (b)
2 (n,elastic) 10.62 (b) 11.99 (b) 1.129 2.766 (b) 5.204 (b)
4 (n,inelastic) ( E-thr = 45.18 keV ) 4.908 (mb) 878.2 (mb)
16 (n,2n) ( E-thr = 6.053 MeV ) 96.56 (mb) 6.948 (mb)
17 (n,3n) ( E-thr = 10.88 MeV ) 342.7 (mb) 66.98 (μb)
18 (n,fission) 2.000 (b) 2.001 (b) 1.000 22.52 (b) 2.659 (b) 2.160 (b)
37 (n,4n) ( E-thr = 17.07 MeV ) 64.57 (nb)
102 (n,γ) 4.500 (b) 4.502 (b) 1.000 6.513 (b) 2.335 (nb) 6.440 (mb)

These cross sections are calculated from JENDL-3.3 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).

MT is a number that defines a reaction type. For the relation between MT and reaction type, please see here or refer to the manual of ENDF formats.

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)
 .