5-B-10

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 3.841 (kb) 3.844 (kb) 1.001 1.468 (b) 2.638 (b)
elastic 2.254 (b) 2.542 (b) 1.128 943.2 (mb) 2.076 (b)
inelastic ( E-thr = 790.7 keV ) 268.5 (mb) 70.84 (mb)
(n,2n) ( E-thr = 8.980 MeV ) 26.83 (mb) 33.22 (μb)
capture 500.0 (mb) 500.3 (mb) 1.001 225.1 (mb) 21.27 (μb) 76.09 (μb)
(n,p) 3.000 (mb) 3.002 (mb) 1.001 65.70 (mb) 37.52 (mb) 15.25 (mb)
(n,d) ( E-thr = 4.801 MeV ) 47.63 (mb) 1.249 (mb)
(n,a) 3.837 (kb) 3.839 (kb) 1.001 1.720 (kb) 48.95 (mb) 435.6 (mb)
(n,t2a) 8.029 (mb) 8.034 (mb) 1.001 200.8 (mb) 94.65 (mb) 38.16 (mb)
MT = 600 3.000 (mb) 3.002 (mb) 1.001 35.46 (mb) 3.364 (mb) 11.71 (mb)
MT = 601 ( E-thr = 3.460 MeV ) 14.00 (mb) 3.322 (mb)
MT = 602 ( E-thr = 6.311 MeV ) 7.123 (mb) 87.40 (μb)
MT = 603 ( E-thr = 6.313 MeV ) 4.710 (mb) 51.43 (μb)
MT = 604 ( E-thr = 6.554 MeV ) 1.509 (mb) 13.46 (μb)
MT = 605 ( E-thr = 6.646 MeV ) 6.808 (mb) 56.07 (μb)
MT = 650 ( E-thr = 4.801 MeV ) 28.07 (mb) 1.183 (mb)
MT = 651 ( E-thr = 7.476 MeV ) 19.56 (mb) 66.15 (μb)
MT = 800 241.8 (b) 241.9 (b) 1.001 109.1 (b) 15.84 (mb) 184.3 (mb)
MT = 801 3.595 (kb) 3.597 (kb) 1.001 1.611 (kb) 33.11 (mb) 251.3 (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)
 .