70-Yb-174

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 110.1 (b) 116.1 (b) 1.054 5.322 (b) 6.811 (b)
2 (n,elastic) 46.92 (b) 52.91 (b) 1.128 2.603 (b) 4.173 (b)
4 (n,inelastic) ( E-thr = 76.91 keV ) 568.1 (mb) 2.597 (b)
16 (n,2n) ( E-thr = 7.508 MeV ) 2.150 (b) 7.614 (mb)
17 (n,3n) ( E-thr = 13.91 MeV ) 0.000 (b) 8.862 (μb)
22 (n,na) 0.000 (b) 0.000 (b) 0.000 (b) 37.74 (μb) 11.41 (nb)
28 (n,np) ( E-thr = 8.026 MeV ) 11.62 (μb) 16.48 (nb)
32 (n,nd) ( E-thr = 12.78 MeV ) 0.000 (b) 8.669e-12 (b)
102 (n,γ) 63.21 (b) 63.19 (b) 1.000 25.48 (b) 723.1 (μb) 33.08 (mb)
103 (n,p) ( E-thr = 2.311 MeV ) 3.086 (mb) 972.6 (nb)
104 (n,d) ( E-thr = 5.788 MeV ) 83.63 (μb) 36.73 (nb)
105 (n,t) ( E-thr = 6.485 MeV ) 10.53 (μb) 6.723 (nb)
106 (n,He-3) ( E-thr = 7.363 MeV ) 0.000 (b) 21.29e-15 (b)
107 (n,a) 0.000 (b) 0.000 (b) 4.892 (μb) 408.0 (μb) 330.0 (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)
 .