20-Ca-46

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 3.680 (b) 4.060 (b) 1.103 2.121 (b) 3.350 (b)
elastic 2.933 (b) 3.311 (b) 1.129 913.8 (mb) 2.943 (b)
inelastic ( E-thr = 1.376 MeV ) 480.9 (mb) 406.7 (mb)
(n,2n) ( E-thr = 10.62 MeV ) 717.6 (mb) 197.2 (μb)
(n,3n) ( E-thr = 18.20 MeV ) 2.777 (nb)
(n,na) ( E-thr = 11.38 MeV ) 316.6e-12 (b) 6.032 (nb)
(n,np) ( E-thr = 14.12 MeV ) 15.18 (nb)
capture 740.2 (mb) 740.6 (mb) 1.001 364.9 (mb) 246.2 (μb) 465.7 (μb)
(n,p) ( E-thr = 7.087 MeV ) 6.691 (mb) 3.425 (μb)
(n,a) ( E-thr = 5.599 MeV ) 548.4 (μb) 400.0 (nb)
MT = 600 ( E-thr = 7.087 MeV ) 1.064 (mb) 1.175 (μb)
MT = 601 ( E-thr = 7.688 MeV ) 174.0 (μb) 399.7 (nb)
MT = 602 ( E-thr = 7.793 MeV ) 1.198 (mb) 587.9 (nb)
MT = 603 ( E-thr = 7.992 MeV ) 1.037 (mb) 406.4 (nb)
MT = 604 ( E-thr = 8.487 MeV ) 916.0 (μb) 299.8 (nb)
MT = 605 ( E-thr = 8.864 MeV ) 825.7 (μb) 210.4 (nb)
MT = 606 ( E-thr = 9.074 MeV ) 64.02 (μb) 31.59 (nb)
MT = 607 ( E-thr = 9.358 MeV ) 141.8 (μb) 31.65 (nb)
MT = 608 ( E-thr = 9.938 MeV ) 356.8 (μb) 59.67 (nb)
MT = 609 ( E-thr = 10.12 MeV ) 372.7 (μb) 60.57 (nb)
MT = 649 ( E-thr = 10.54 MeV ) 541.0 (μb) 162.1 (nb)
MT = 800 ( E-thr = 5.599 MeV ) 265.5 (μb) 338.5 (nb)
MT = 849 ( E-thr = 7.469 MeV ) 282.9 (μb) 61.51 (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)
 .