55-Cs-136

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 16.55 (b) 17.03 (b) 1.029 4.981 (b) 5.836 (b)
elastic 3.513 (b) 3.967 (b) 1.129 3.178 (b) 4.515 (b)
inelastic ( E-thr = 105.0 keV ) 139.2 (mb) 1.301 (b)
(n,2n) ( E-thr = 6.879 MeV ) 1.659 (b) 6.235 (mb)
(n,3n) ( E-thr = 15.71 MeV ) 931.8 (nb)
(n,na) ( E-thr = 3.086 MeV ) 3.186 (μb) 2.166 (nb)
(n,2na) ( E-thr = 9.460 MeV ) 461.8e-18 (b) 91.99e-15 (b)
(n,np) ( E-thr = 7.264 MeV ) 317.0 (μb) 96.32 (nb)
(n,n2a) ( E-thr = 6.629 MeV ) 43.84e-36 (b) 23.83e-27 (b)
(n,2n2a) ( E-thr = 12.65 MeV ) 0.000 (b) 0.000 (b)
(n,nd) ( E-thr = 11.43 MeV ) 12.33e-12 (b) 123.7e-12 (b)
(n,nt) ( E-thr = 13.75 MeV ) 51.33e-24 (b) 2.708e-12 (b)
(n,n He-3) ( E-thr = 15.50 MeV ) 13.32e-24 (b)
(n,n He-3) ( E-thr = 13.68 MeV ) 118.9e-18 (b) 16.49e-12 (b)
(n,4n) ( E-thr = 16.97 MeV ) 41.90e-33 (b)
(n,3nfiss) ( E-thr = 10.92 MeV ) 0.000 (b) 1.395e-24 (b)
capture 13.01 (b) 13.01 (b) 1.001 42.95 (b) 1.509 (mb) 12.93 (mb)
(n,p) 0.000 (b) 0.000 (b) 105.0 (μb) 6.815 (mb) 6.093 (μb)
(n,d) ( E-thr = 5.023 MeV ) 230.1 (μb) 45.35 (nb)
(n,t) ( E-thr = 5.131 MeV ) 13.96 (μb) 5.736 (nb)
(n,He-3) ( E-thr = 9.194 MeV ) 108.4e-18 (b) 26.59e-15 (b)
(n,a) 4.415 (nb) 4.417 (nb) 1.001 8.886 (μb) 758.0 (μb) 587.4 (nb)
(n,2a) 0.000 (b) 0.000 (b) 75.36e-24 (b) 84.73e-18 (b) 1.860e-18 (b)
(n,2p) ( E-thr = 9.123 MeV ) 167.4e-18 (b) 662.6e-18 (b)
(n,pa) ( E-thr = 2.820 MeV ) 18.90e-15 (b) 342.2e-18 (b)
MT = 115 ( E-thr = 14.73 MeV ) 6.220e-24 (b)
MT = 116 ( E-thr = 14.73 MeV ) 300.9e-27 (b)
MT = 117 ( E-thr = 8.683 MeV ) 7.919e-30 (b) 474.9e-24 (b)

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)
 .