63-Eu-155

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 3.767 (kb) 3.852 (kb) 1.023 5.404 (b) 6.701 (b)
2 (n,elastic) 6.601 (b) 8.703 (b) 1.318 2.947 (b) 4.048 (b)
4 (n,inelastic) ( E-thr = 79.15 keV ) 531.3 (mb) 2.567 (b)
16 (n,2n) ( E-thr = 8.204 MeV ) 1.919 (b) 3.631 (mb)
17 (n,3n) ( E-thr = 14.69 MeV ) 3.272 (μb)
22 (n,na) ( E-thr = 859.7 keV ) 10.68 (μb) 3.795 (nb)
28 (n,np) ( E-thr = 6.695 MeV ) 278.0 (μb) 95.91 (nb)
32 (n,nd) ( E-thr = 12.48 MeV ) 209.7e-21 (b) 49.37e-12 (b)
33 (n,nt) ( E-thr = 12.08 MeV ) 426.4e-21 (b) 8.024e-12 (b)
41 (n,2np) ( E-thr = 14.71 MeV ) 1.949e-12 (b)
102 (n,γ) 3.761 (kb) 3.843 (kb) 1.022 15.51 (kb) 789.2 (μb) 82.00 (mb)
103 (n,p) ( E-thr = 850.4 keV ) 5.081 (mb) 2.075 (μb)
104 (n,d) ( E-thr = 4.456 MeV ) 507.8 (μb) 104.3 (nb)
105 (n,t) ( E-thr = 6.177 MeV ) 2.754 (μb) 1.910 (nb)
106 (n,He-3) ( E-thr = 8.052 MeV ) 53.85e-18 (b) 7.325e-15 (b)
107 (n,a) 165.8e-12 (b) 166.1e-12 (b) 1.002 1.518 (μb) 311.4 (μb) 132.0 (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).

MT is a number that defines a reaction type. For the relation between MT and reaction type, please see here or refer to the manual of ENDF formats.

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)
 .