33-As-78



Spin
     Level energy(keV)   Spin & Parity       
     ----------------------------------------
       ground state      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)
     77.921827773 ± 0.000010534 (amu)  [mass excess = -72816.961 ± 9.813 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
     4208.949 ± 9.813 (keV) 
Strong Gamma-rays from Decay of As- 78 (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 
  ----------------------------------------------------------
        613.8            54.           B- 
        694.9            16.74         B- 
       1308.7            12.96         B- 
  ----------------------------------------------------------
     *: 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 
       B-           90.7 M 2         
Evaluated Data Libraries
     Links to the libraries. 

Parent Nuclides by Reactions in JENDL-4.0
     Se- 78 (Z= 34, A= 78), MT=103 (n,p)
     Se- 79 (Z= 34, A= 79), MT= 28 (n,np)
     Se- 79 (Z= 34, A= 79), MT=104 (n,d)
     Se- 80 (Z= 34, A= 80), MT=105 (n,t)
     Br- 81 (Z= 35, A= 81), MT=107 (n,α)

Fission Yields for Fission Products in JENDL-4.0 Fission Yield Data

   - Neutron-induced Fission Yields (from main actinide nuclides) - Independent Fission Yield -
     Product  Nuclide  Energy   Fission Yield  Uncertainty(1σ)
    -----------------------------------------------------------
     As- 78    U-235   Thermal   1.297940e-06   2.985250e-07 
     As- 78    U-235   Fast      2.844130e-06   1.820240e-06 
     As- 78    U-235   High      2.784810e-05   1.782280e-05 
     As- 78    U-238   Fast      1.540570e-07   9.859670e-08 
     As- 78    U-238   High      6.026570e-06   3.857000e-06 
     As- 78   Pu-239   Thermal   9.878450e-06   6.322200e-06 
     As- 78   Pu-239   Fast      7.648770e-06   4.895200e-06 
     As- 78   Pu-239   High      2.546650e-05   1.629860e-05 
     As- 78   Pu-241   Thermal   3.230520e-06   2.067540e-06 
     As- 78   Pu-241   Fast      1.868590e-06   1.195900e-06 
    -----------------------------------------------------------
    Thermal=0.0253eV, Fast=500keV(Fast reactor spectrum), High=14MeV
   - Neutron-induced Fission Yields (from main actinide nuclides) - Cumulative Fission Yield -
     Product  Nuclide  Energy   Fission Yield  Uncertainty(1σ)
    -----------------------------------------------------------
     As- 78    U-235   Thermal   2.093470e-04   2.306290e-05 
     As- 78    U-235   Fast      5.700480e-04   1.313730e-04 
     As- 78    U-235   High      9.987330e-04   2.293510e-04 
     As- 78    U-238   Fast      1.123010e-04   3.591070e-05 
     As- 78    U-238   High      5.720280e-04   1.828180e-04 
     As- 78   Pu-239   Thermal   1.876220e-04   8.443700e-05 
     As- 78   Pu-239   Fast      2.291920e-04   1.031470e-04 
     As- 78   Pu-239   High      4.149340e-04   1.326820e-04 
     As- 78   Pu-241   Thermal   1.152080e-04   1.842880e-05 
     As- 78   Pu-241   Fast      1.840320e-04   5.893130e-05 
    -----------------------------------------------------------
    Thermal=0.0253eV, Fast=500keV(Fast reactor spectrum), High=14MeV
      → Neutron-induced and Spontaneous Fission Yields of all nuclides in JENDL-4.0 Fission Yield Data