9-F-0

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 3.751 (b) 4.233 (b) 1.128 1.741 (b) 3.610 (b)
elastic 3.742 (b) 4.223 (b) 1.129 1.046 (b) 2.324 (b)
inelastic ( E-thr = 115.8 keV ) 164.2 (mb) 1.265 (b)
(n,2n) ( E-thr = 10.99 MeV ) 42.94 (mb) 8.615 (μb)
(n,na) ( E-thr = 4.226 MeV ) 359.4 (mb) 4.614 (mb)
(n,np) ( E-thr = 8.417 MeV ) 42.81 (mb) 13.20 (μb)
(n,nd) ( E-thr = 14.55 MeV ) 31.83 (nb)
capture 9.570 (mb) 9.576 (mb) 1.001 19.47 (mb) 25.67 (μb) 211.7 (μb)
(n,p) ( E-thr = 4.251 MeV ) 14.66 (mb) 1.163 (mb)
(n,d) ( E-thr = 6.074 MeV ) 34.08 (mb) 75.92 (μb)
(n,t) ( E-thr = 7.959 MeV ) 15.30 (mb) 30.23 (μb)
(n,a) ( E-thr = 1.603 MeV ) 21.34 (mb) 14.65 (mb)
MT = 203 ( E-thr = 4.251 MeV ) 57.47 (mb) 1.176 (mb)
MT = 204 ( E-thr = 6.074 MeV ) 34.08 (mb) 75.95 (μb)
MT = 205 ( E-thr = 7.959 MeV ) 15.30 (mb) 30.23 (μb)
MT = 207 ( E-thr = 1.603 MeV ) 380.8 (mb) 19.26 (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)
 .