53-I-137



Spin
     Level energy(keV)   Spin & Parity       
     ----------------------------------------
       ground state      (7/2+)                
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)
     136.918028188 ± 0.000009000 (amu)  [mass excess = -76356.251 ± 8.383 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
     6027.146 ± 8.384 (keV) 
Strong Gamma-rays from Decay of I-137 (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 
  ----------------------------------------------------------
        601.05            4.8          B- 
       1218.00           12.8          B- 
       1302.64            4.42         B- 
       4298.3             0.01         B- 
       4379.7             0.04         B- 
       4880.5             0.01         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-           24.5 S 2         
       B-           24.5 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)
    -----------------------------------------------------------
      I-137    U-235   Thermal   2.618380e-02   1.047360e-03 
      I-137    U-235   Fast      2.396630e-02   1.437980e-03 
      I-137    U-235   High      1.290870e-02   4.130760e-03 
      I-137    U-238   Fast      3.532540e-02   5.652070e-03 
      I-137    U-238   High      2.578980e-02   4.126380e-03 
      I-137   Pu-239   Thermal   2.299100e-02   1.379460e-03 
      I-137   Pu-239   Fast      1.887930e-02   3.020690e-03 
      I-137   Pu-239   High      6.656950e-03   4.260440e-03 
      I-137   Pu-241   Thermal   3.515360e-02   2.812290e-03 
      I-137   Pu-241   Fast      3.356470e-02   5.370340e-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)
    -----------------------------------------------------------
      I-137    U-235   Thermal   3.061800e-02   8.612610e-04 
      I-137    U-235   Fast      2.560720e-02   1.540600e-03 
      I-137    U-235   High      1.369630e-02   3.145610e-03 
      I-137    U-238   Fast      5.125570e-02   4.100030e-03 
      I-137    U-238   High      3.124130e-02   2.497250e-03 
      I-137   Pu-239   Thermal   2.425900e-02   9.705180e-04 
      I-137   Pu-239   Fast      2.001960e-02   2.202520e-03 
      I-137   Pu-239   High      6.934400e-03   3.118490e-03 
      I-137   Pu-241   Thermal   4.022950e-02   2.413490e-03 
      I-137   Pu-241   Fast      3.897390e-02   4.290680e-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