51-Sb-121

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 9.600 (b) 10.09 (b) 1.051 4.705 (b) 5.766 (b)
elastic 3.606 (b) 4.069 (b) 1.129 2.375 (b) 4.315 (b)
inelastic ( E-thr = 37.41 keV ) 696.9 (mb) 1.368 (b)
(n,2n) ( E-thr = 9.325 MeV ) 1.621 (b) 882.5 (μb)
(n,3n) ( E-thr = 16.39 MeV ) 186.8 (nb)
(n,na) ( E-thr = 3.112 MeV ) 11.21 (μb) 4.650 (nb)
(n,np) ( E-thr = 5.833 MeV ) 1.008 (mb) 391.1 (nb)
capture 5.994 (b) 6.017 (b) 1.004 214.0 (b) 1.004 (mb) 82.35 (mb)
(n,p) 0.000 (b) 0.000 (b) 477.9 (μb) 9.112 (mb) 33.70 (μb)
(n,d) ( E-thr = 3.590 MeV ) 2.373 (mb) 1.040 (μb)
(n,t) ( E-thr = 6.450 MeV ) 37.85 (μb) 18.65 (nb)
(n,a) 0.000 (b) 0.000 (b) 27.31 (μb) 2.520 (mb) 1.802 (μb)
MT = 203 0.000 (b) 0.000 (b) 481.8 (μb) 10.12 (mb) 34.09 (μb)
MT = 204 ( E-thr = 3.590 MeV ) 2.373 (mb) 1.040 (μb)
MT = 205 ( E-thr = 6.450 MeV ) 37.85 (μb) 18.65 (nb)
MT = 207 0.000 (b) 0.000 (b) 27.31 (μb) 2.531 (mb) 1.807 (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)
 .