54-Xe-138



Spin
     Level energy(keV)   Spin & Parity       
     ----------------------------------------
       ground state      0+                    
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)
     137.914146273 ± 0.000003010 (amu)  [mass excess = -79972.231 ± 2.804 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
     2914.817 ± 9.578 (keV) 
Strong Gamma-rays from Decay of Xe-138 (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 
  ----------------------------------------------------------
        258.41           31.5          B- 
        434.56           20.32         B- 
       1768.26           16.73         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-           14.08 M 8        
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)
    -----------------------------------------------------------
     Xe-138    U-235   Thermal   4.806820e-02   1.345910e-03 
     Xe-138    U-235   Fast      4.673470e-02   1.308570e-03 
     Xe-138    U-235   High      2.649380e-02   2.914310e-03 
     Xe-138    U-238   Fast      2.040730e-02   6.530310e-03 
     Xe-138    U-238   High      1.847370e-02   1.108420e-03 
     Xe-138   Pu-239   Thermal   3.925110e-02   1.099030e-03 
     Xe-138   Pu-239   Fast      3.701980e-02   1.480790e-03 
     Xe-138   Pu-239   High      1.709880e-02   4.787660e-04 
     Xe-138   Pu-241   Thermal   4.061230e-02   2.436730e-03 
     Xe-138   Pu-241   Fast      4.010490e-02   1.283350e-02 
    -----------------------------------------------------------
    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)
    -----------------------------------------------------------
     Xe-138    U-235   Thermal   6.286110e-02   8.880790e-04 
     Xe-138    U-235   Fast      5.995540e-02   8.525110e-04 
     Xe-138    U-235   High      3.167160e-02   8.866230e-04 
     Xe-138    U-238   Fast      5.698010e-02   1.597040e-03 
     Xe-138    U-238   High      4.532700e-02   9.063570e-04 
     Xe-138   Pu-239   Thermal   5.168730e-02   7.241870e-04 
     Xe-138   Pu-239   Fast      4.710270e-02   9.425790e-04 
     Xe-138   Pu-239   High      1.816470e-02   3.632390e-04 
     Xe-138   Pu-241   Thermal   6.256690e-02   1.752330e-03 
     Xe-138   Pu-241   Fast      5.810750e-02   9.307400e-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