11-Na-0

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 3.623 (b) 4.021 (b) 1.110 1.717 (b) 3.208 (b)
elastic 3.091 (b) 3.490 (b) 1.129 806.0 (mb) 2.680 (b)
inelastic ( E-thr = 459.3 keV ) 449.1 (mb) 525.7 (mb)
(n,2n) ( E-thr = 12.96 MeV ) 13.14 (mb) 2.554 (μb)
(n,na) ( E-thr = 10.93 MeV ) 8.594 (mb) 2.633 (μb)
(n,np) ( E-thr = 9.178 MeV ) 287.5 (mb) 102.8 (μb)
capture 531.4 (mb) 531.7 (mb) 1.001 311.7 (mb) 190.0 (μb) 282.5 (μb)
(n,p) ( E-thr = 3.750 MeV ) 39.66 (mb) 1.522 (mb)
(n,a) ( E-thr = 4.035 MeV ) 111.9 (mb) 673.9 (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)
 .