85-At-203


Spin 
     Level energy(keV)   Spin & Parity       
     ----------------------------------------
       ground state      9/2-
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) 
     202.986942990 ± 0.000011353 (amu)  [mass excess = -12162.526 ± 10.576 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012) 
     -6003.247 ± 25.803 (keV)
Strong Gamma-rays from Decay of At-203 (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 
  ----------------------------------------------------------
        639.4            20.01         EC 
        641.5            11.17         EC 
        738.1             7.68         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 
       A            7.4 M 2          
       EC           7.4 M 2
Evaluated Data Libraries 
     Links to the libraries.

Parent Nuclides by Reactions in JENDL-4.0