64-Gd-157

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 254.7 (kb) 217.0 (kb) 0.852 5.699 (b) 6.980 (b)
2 (n,elastic) 1.009 (kb) 924.7 (b) 0.916 3.423 (b) 4.701 (b)
4 (n,inelastic) ( E-thr = 54.85 keV ) 531.9 (mb) 2.154 (b)
16 (n,2n) ( E-thr = 6.406 MeV ) 1.736 (b) 10.69 (mb)
17 (n,3n) ( E-thr = 15.00 MeV ) 5.360 (μb)
22 (n,na) ( E-thr = 694.3 keV ) 18.38 (μb) 8.865 (nb)
28 (n,np) ( E-thr = 8.087 MeV ) 11.20 (μb) 14.13 (nb)
32 (n,nd) ( E-thr = 12.14 MeV ) 25.93e-21 (b) 259.4e-12 (b)
102 (n,γ) 253.7 (kb) 216.1 (kb) 0.852 761.5 (b) 1.002 (mb) 112.8 (mb)
103 (n,p) ( E-thr = 581.3 keV ) 4.450 (mb) 2.006 (μb)
104 (n,d) ( E-thr = 5.762 MeV ) 483.5 (μb) 123.4 (nb)
105 (n,t) ( E-thr = 5.912 MeV ) 23.35 (μb) 15.04 (nb)
107 (n,a) 477.5 (μb) 407.9 (μb) 0.854 7.085 (μb) 1.173 (mb) 652.1 (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)
 .