63-Eu-158



Spin
     Level energy(keV)   Spin & Parity       
     ----------------------------------------
       ground state      (1-)                  
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)
     157.927798606 ± 0.000011008 (amu)  [mass excess = -67255.165 ± 10.255 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
     3433.727 ± 10.382 (keV) 
Strong Gamma-rays from Decay of Eu-158 (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 
  ----------------------------------------------------------
        897.61           12.36         B- 
        944.15           30.           B- 
        977.14           16.29         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-           45.9 M 2         
Evaluated Data Libraries
     Links to the libraries. 

Parent Nuclides by Reactions in JENDL-4.0
     Eu-157 (Z= 63, A=157), MT=102 (n,γ)
     Gd-158 (Z= 64, A=158), MT=103 (n,p)
     Gd-160 (Z= 64, A=160), MT= 32 (n,nd)
     Gd-160 (Z= 64, A=160), MT=105 (n,t)
     Tb-160 (Z= 65, A=160), MT=106 (n,3He)

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)
    -----------------------------------------------------------
     Eu-158    U-235   Thermal   1.277970e-06   8.178970e-07 
     Eu-158    U-235   Fast      1.387140e-06   8.877670e-07 
     Eu-158    U-235   High      7.809710e-05   4.998210e-05 
     Eu-158    U-238   Fast      7.762890e-07   4.968250e-07 
     Eu-158    U-238   High      1.387510e-05   8.880070e-06 
     Eu-158   Pu-239   Thermal   5.379150e-05   3.442660e-05 
     Eu-158   Pu-239   Fast      1.024630e-04   6.557650e-05 
     Eu-158   Pu-239   High      3.712410e-04   2.375940e-04 
     Eu-158   Pu-241   Thermal   1.775290e-05   1.136180e-05 
     Eu-158   Pu-241   Fast      4.175860e-05   2.672550e-05 
    -----------------------------------------------------------
    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)
    -----------------------------------------------------------
     Eu-158    U-235   Thermal   3.278720e-05   5.255980e-06 
     Eu-158    U-235   Fast      6.481020e-05   2.078100e-05 
     Eu-158    U-235   High      2.288770e-04   5.256390e-05 
     Eu-158    U-238   Fast      1.849420e-04   5.915880e-05 
     Eu-158    U-238   High      4.262920e-04   1.362640e-04 
     Eu-158   Pu-239   Thermal   4.127970e-04   1.321170e-04 
     Eu-158   Pu-239   Fast      6.527260e-04   2.089020e-04 
     Eu-158   Pu-239   High      6.453740e-04   2.902280e-04 
     Eu-158   Pu-241   Thermal   9.225440e-04   2.951610e-04 
     Eu-158   Pu-241   Fast      1.118320e-03   3.581320e-04 
    -----------------------------------------------------------
    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