55-Cs-123



Spin
     Level energy(keV)   Spin & Parity       
     ----------------------------------------
       ground state      1/2+                  
       1.56270E+02       (11/2)-               
Mass (The Ame2012 atomic mass evaluation (II) by M.Wang, G.Audi, A.H.Wapstra, F.G.Kondev, M.MacCormick, X.Xu, and B.Pfeiffer Chinese Physics C36 p. 1603-2014, December 2012)
     122.912996063 ± 0.000013000 (amu)  [mass excess = -81043.645 ± 12.109 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
     -5388.693 ± 17.125 (keV) 
Strong Gamma-rays from Decay of Cs-123 (Compiled from ENSDF as of March 2011)
  [ Intensities before May 23th of 2013 were values when total intensity of the decay mode was 100(%) and a branching ratio of each decay mode was not multiplied. ]
   γ-ray energy(keV)  Intensity(%)  Decay mode 
  ----------------------------------------------------------
         61.7             0.36         IT 
         64.0             4.5          IT 
         94.6            30.           IT 
  ----------------------------------------------------------
         83.38            4.09         EC 
         97.39           22.7          EC 
        596.6            10.1          EC 
  ----------------------------------------------------------
     *: relative, ~ approximate, ? calculated or estimatted 
     >: greater than or equal to, <: less than or equal to  
  [ Intensities; total intensity of the nuclide is 100(%). ]
Decay data(Chart of the Nuclides 2014)
     Decay mode     Half-life 
       EC           5.88 M 3         
       IT           1.64 S 12        
Evaluated Data Libraries
     Links to the libraries. 

Parent Nuclides by Reactions in JENDL-4.0