61-Pm-148

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 2.007 (kb) 2.009 (kb) 1.001 5.085 (b) 6.439 (b)
(n,elastic) 6.222 (b) 7.025 (b) 1.129 2.732 (b) 4.020 (b)
(n,inelastic) ( E-thr = 76.22 keV ) 274.8 (mb) 2.325 (b)
(n,2n) ( E-thr = 5.935 MeV ) 2.054 (b) 24.69 (mb)
(n,3n) ( E-thr = 13.65 MeV ) 1.549 (mb) 12.63 (μb)
(n,na) 0.000 (b) 0.000 (b) 3.544 (μb) 394.2 (μb) 274.0 (nb)
(n,2na) ( E-thr = 4.324 MeV ) 89.75 (μb) 12.73 (nb)
(n,np) ( E-thr = 6.050 MeV ) 1.748 (mb) 447.5 (nb)
(n,nd) ( E-thr = 9.138 MeV ) 433.7 (nb) 2.601 (nb)
(n,nt) ( E-thr = 10.46 MeV ) 334.3e-12 (b) 297.9e-12 (b)
(n,n He-3) ( E-thr = 11.38 MeV ) 1.387 (nb) 1.643 (nb)
(n,γ) 2.001 (kb) 2.002 (kb) 1.001 1.448 (kb) 854.7 (μb) 71.89 (mb)
(n,p) 38.25 (nb) 38.28 (nb) 1.001 236.7 (μb) 16.44 (mb) 13.56 (μb)
(n,d) ( E-thr = 3.810 MeV ) 1.538 (mb) 331.0 (nb)
(n,t) ( E-thr = 2.839 MeV ) 204.2 (μb) 42.61 (nb)
(n,He-3) ( E-thr = 7.066 MeV ) 1.748e-12 (b) 274.0e-15 (b)
(n,a) 434.3 (mb) 434.6 (mb) 1.001 234.2 (mb) 3.088 (mb) 56.10 (μb)
(n,2a) 62.66e-18 (b) 63.52e-18 (b) 1.014 362.1e-12 (b) 102.1 (nb) 39.08e-12 (b)

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)
 .