58-Ce-149



Spin
     Level energy(keV)   Spin & Parity       
     ----------------------------------------
       ground state      (3/2-)                
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)
     148.928426900 ± 0.000011000 (amu)  [mass excess = -66669.913 ± 10.246 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
     4369.452 ± 14.230 (keV) 
Strong Gamma-rays from Decay of Ce-149 (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 
  ----------------------------------------------------------
         57.7          *100.           B- 
         86.4          * 20.2          B- 
        380.0          * 33.7          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-           5.3 S 2          
Evaluated Data Libraries
     Links to the libraries. 

Parent Nuclides by Reactions in JENDL-4.0 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)
    -----------------------------------------------------------
     Ce-149    U-235   Thermal   6.968490e-03   1.114950e-03 
     Ce-149    U-235   Fast      7.561320e-03   2.419630e-03 
     Ce-149    U-235   High      3.053990e-03   1.954560e-03 
     Ce-149    U-238   Fast      8.430670e-03   3.793800e-03 
     Ce-149    U-238   High      8.592580e-03   3.866660e-03 
     Ce-149   Pu-239   Thermal   5.619160e-03   3.596270e-03 
     Ce-149   Pu-239   Fast      6.415290e-03   4.105790e-03 
     Ce-149   Pu-239   High      2.164590e-03   1.385340e-03 
     Ce-149   Pu-241   Thermal   1.020190e-02   3.264600e-03 
     Ce-149   Pu-241   Fast      9.980010e-03   4.491000e-03 
    -----------------------------------------------------------
    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)
    -----------------------------------------------------------
     Ce-149    U-235   Thermal   7.766880e-03   6.225390e-04 
     Ce-149    U-235   Fast      8.828880e-03   2.035430e-03 
     Ce-149    U-235   High      3.342760e-03   2.136490e-03 
     Ce-149    U-238   Fast      1.546230e-02   2.476460e-03 
     Ce-149    U-238   High      1.205590e-02   3.856500e-03 
     Ce-149   Pu-239   Thermal   5.980350e-03   2.691820e-03 
     Ce-149   Pu-239   Fast      6.802840e-03   3.062000e-03 
     Ce-149   Pu-239   High      2.278780e-03   1.457590e-03 
     Ce-149   Pu-241   Thermal   1.267380e-02   2.915700e-03 
     Ce-149   Pu-241   Fast      1.177850e-02   3.773150e-03 
    -----------------------------------------------------------
    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