61-Pm-151

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 507.5 (b) 509.7 (b) 1.004 5.160 (b) 6.597 (b)
(n,elastic) 7.024 (b) 7.930 (b) 1.129 2.679 (b) 3.875 (b)
(n,inelastic) ( E-thr = 85.69 keV ) 441.3 (mb) 2.672 (b)
(n,2n) ( E-thr = 7.916 MeV ) 2.030 (b) 4.374 (mb)
(n,3n) ( E-thr = 13.56 MeV ) 3.703 (mb) 14.47 (μb)
(n,na) ( E-thr = 367.8 keV ) 25.92 (μb) 16.32 (nb)
(n,2na) ( E-thr = 7.226 MeV ) 1.726 (nb) 6.035e-12 (b)
(n,np) ( E-thr = 7.041 MeV ) 166.7 (μb) 66.30 (nb)
(n,nd) ( E-thr = 12.23 MeV ) 186.4e-18 (b) 124.5e-12 (b)
(n,nt) ( E-thr = 11.00 MeV ) 922.0e-15 (b) 50.98e-12 (b)
(n,n He-3) ( E-thr = 14.47 MeV ) 4.764e-12 (b)
(n,γ) 500.2 (b) 500.5 (b) 1.001 1.261 (kb) 809.1 (μb) 45.59 (mb)
(n,p) ( E-thr = 1.671 MeV ) 3.263 (mb) 999.7 (nb)
(n,d) ( E-thr = 4.802 MeV ) 442.4 (μb) 93.54 (nb)
(n,t) ( E-thr = 5.932 MeV ) 6.037 (μb) 2.896 (nb)
(n,He-3) ( E-thr = 9.260 MeV ) 23.65e-21 (b) 942.6e-18 (b)
(n,a) 323.3e-12 (b) 323.5e-12 (b) 1.001 3.458 (μb) 403.0 (μb) 243.9 (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)
 .