63-Eu-156

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 109.2 (b) 110.8 (b) 1.014 5.415 (b) 7.196 (b)
2 (n,elastic) 9.030 (b) 10.20 (b) 1.129 2.844 (b) 4.221 (b)
4 (n,inelastic) ( E-thr = 22.66 keV ) 627.9 (mb) 2.920 (b)
16 (n,2n) ( E-thr = 6.381 MeV ) 1.940 (b) 17.89 (mb)
17 (n,3n) ( E-thr = 14.58 MeV ) 4.909 (μb)
22 (n,na) ( E-thr = 1.264 MeV ) 3.272 (μb) 1.666 (nb)
24 (n,2na) ( E-thr = 7.240 MeV ) 11.65e-12 (b) 1.223e-12 (b)
28 (n,np) ( E-thr = 7.231 MeV ) 166.3 (μb) 73.25 (nb)
32 (n,nd) ( E-thr = 10.84 MeV ) 102.9e-12 (b) 394.5e-12 (b)
33 (n,nt) ( E-thr = 12.56 MeV ) 17.63e-24 (b) 6.744e-12 (b)
41 (n,2np) ( E-thr = 13.08 MeV ) 18.30e-18 (b) 21.88e-12 (b)
102 (n,γ) 100.0 (b) 100.1 (b) 1.001 641.6 (b) 800.8 (μb) 37.71 (mb)
103 (n,p) 0.000 (b) 0.000 (b) 22.78 (μb) 5.559 (mb) 2.225 (μb)
104 (n,d) ( E-thr = 4.992 MeV ) 372.2 (μb) 79.43 (nb)
105 (n,t) ( E-thr = 4.539 MeV ) 14.52 (μb) 4.971 (nb)
106 (n,He-3) ( E-thr = 8.509 MeV ) 181.1e-18 (b) 11.46e-15 (b)
107 (n,a) 1.224 (μb) 1.224 (μb) 1.001 3.322 (μb) 408.0 (μb) 219.8 (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)
 .