68-Er-0

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 164.6 (b) 176.0 (b) 1.069 5.512 (b) 6.814 (b)
elastic 8.969 (b) 10.10 (b) 1.126 2.746 (b) 4.542 (b)
inelastic ( E-thr = 79.15 keV ) 472.7 (mb) 2.195 (b)
(n,2n) ( E-thr = 6.474 MeV ) 2.284 (b) 6.657 (mb)
(n,3n) ( E-thr = 13.34 MeV ) 4.150 (mb) 5.709 (μb)
(n,na) 0.000 (b) 0.000 (b) 304.6 (nb) 32.13 (μb) 18.55 (nb)
(n,np) ( E-thr = 6.468 MeV ) 41.98 (μb) 25.69 (nb)
(n,nd) ( E-thr = 11.60 MeV ) 423.1e-15 (b) 43.57e-12 (b)
capture 155.6 (b) 165.9 (b) 1.066 748.3 (b) 1.919 (mb) 71.14 (mb)
(n,p) 0.000 (b) 0.000 (b) 32.02 (μb) 4.524 (mb) 2.271 (μb)
(n,d) ( E-thr = 4.230 MeV ) 394.2 (μb) 82.83 (nb)
(n,t) ( E-thr = 5.301 MeV ) 7.044 (μb) 2.398 (nb)
(n,a) 0.000 (b) 0.000 (b) 21.93 (μb) 841.1 (μb) 1.570 (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).

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)
 .