61-Pm-147

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
(n,total) 188.7 (b) 190.6 (b) 1.010 5.066 (b) 6.651 (b)
(n,elastic) 20.98 (b) 23.29 (b) 1.110 2.774 (b) 4.327 (b)
(n,inelastic) ( E-thr = 91.73 keV ) 272.2 (mb) 2.251 (b)
(n,2n) ( E-thr = 7.712 MeV ) 2.005 (b) 5.849 (mb)
(n,3n) ( E-thr = 14.01 MeV ) 5.702 (μb)
(n,na) 0.000 (b) 0.000 (b) 127.2 (μb) 840.2 (μb) 4.815 (μb)
(n,2na) ( E-thr = 5.791 MeV ) 10.13 (μb) 6.253 (nb)
(n,3na) ( E-thr = 11.67 MeV ) 223.9e-36 (b) 9.431 (nb)
(n,np) ( E-thr = 5.443 MeV ) 1.635 (mb) 409.7 (nb)
(n,nd) ( E-thr = 10.82 MeV ) 939.0e-12 (b) 802.2e-12 (b)
(n,nt) ( E-thr = 10.31 MeV ) 209.6e-12 (b) 146.0e-12 (b)
(n,n He-3) ( E-thr = 13.06 MeV ) 1.076e-15 (b) 398.8e-12 (b)
(n,γ) 167.7 (b) 167.3 (b) 0.997 2.188 (kb) 837.0 (μb) 68.90 (mb)
(n,p) ( E-thr = 114.4 keV ) 8.331 (mb) 6.019 (μb)
(n,d) ( E-thr = 3.203 MeV ) 1.949 (mb) 464.6 (nb)
(n,t) ( E-thr = 4.520 MeV ) 72.77 (μb) 16.36 (nb)
(n,He-3) ( E-thr = 6.319 MeV ) 2.156e-12 (b) 295.2e-15 (b)
(n,a) 1.053 (mb) 1.054 (mb) 1.001 5.178 (mb) 2.500 (mb) 20.77 (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)
 .