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) 3.850 (kb) 1.022 5.017 (b) 6.597 (b)
2 (n,elastic) 6.601 (b) 8.698 (b) 1.318 3.251 (b) 4.585 (b)
4 (n,inelastic) ( E-thr = 79.11 keV ) 217.7 (mb) 1.890 (b)
16 (n,2n) ( E-thr = 8.228 MeV ) 1.543 (b) 2.666 (mb)
17 (n,3n) ( E-thr = 14.71 MeV ) 6.195 (μb)
22 (n,na) ( E-thr = 866.5 keV ) 60.28 (μb) 18.74 (nb)
28 (n,np) ( E-thr = 6.708 MeV ) 195.7 (μb) 62.30 (nb)
32 (n,nd) ( E-thr = 12.41 MeV ) 0.000 (b) 252.7e-12 (b)
33 (n,nt) ( E-thr = 12.09 MeV ) 12.25e-21 (b) 75.12e-12 (b)
102 (n,γ) 3.761 (kb) 3.841 (kb) 1.021 15.52 (kb) 1.003 (mb) 119.6 (mb)
103 (n,p) ( E-thr = 852.0 keV ) 2.763 (mb) 1.031 (μb)
104 (n,d) ( E-thr = 4.383 MeV ) 171.3 (μb) 60.41 (nb)
105 (n,t) ( E-thr = 6.182 MeV ) 10.61 (μb) 11.94 (nb)
107 (n,a) 0.000 (b) 0.000 (b) 7.542 (μb) 1.079 (mb) 584.6 (nb)

These cross sections are calculated from JENDL-3.3 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)
 .