70-Yb-168

MT Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
1 (n,total) 2.311 (kb) 2.445 (kb) 1.058 5.251 (b) 6.902 (b)
2 (n,elastic) 2.984 (b) 4.341 (b) 1.455 2.575 (b) 4.126 (b)
4 (n,inelastic) ( E-thr = 88.26 keV ) 790.1 (mb) 2.325 (b)
16 (n,2n) ( E-thr = 9.106 MeV ) 1.869 (b) 1.530 (mb)
17 (n,3n) ( E-thr = 16.23 MeV ) 391.4 (nb)
22 (n,na) 0.000 (b) 0.000 (b) 1.707 (μb) 484.5 (μb) 217.9 (nb)
28 (n,np) ( E-thr = 6.353 MeV ) 581.5 (μb) 162.4 (nb)
32 (n,nd) ( E-thr = 12.89 MeV ) 0.000 (b) 9.656e-12 (b)
102 (n,γ) 2.308 (kb) 2.441 (kb) 1.057 21.35 (kb) 1.153 (mb) 450.2 (mb)
103 (n,p) 0.000 (b) 0.000 (b) 402.4 (μb) 14.70 (mb) 21.24 (μb)
104 (n,d) ( E-thr = 4.115 MeV ) 1.313 (mb) 288.9 (nb)
105 (n,t) ( E-thr = 6.599 MeV ) 9.390 (μb) 7.059 (nb)
106 (n,He-3) ( E-thr = 3.524 MeV ) 2.004e-12 (b) 5.741e-12 (b)
107 (n,a) 0.000 (b) 0.000 (b) 229.2 (μb) 3.335 (mb) 25.99 (μb)

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)
 .