Level energy(keV)   Spin & Parity       
       ground state      (3-)                  
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)
     240.055300384 ± 0.000014925 (amu)  [mass excess = 51511.976 ± 13.903 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
     -213.589 ± 13.898 (keV) 
Strong Gamma-rays from Decay of Am-240 (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 
         98.9             1.47         EC 
        888.85           24.75         EC 
        987.79           72.18         EC 
     *: 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 
       EC           50.8 H 3         
Cross Sections (taken from JENDL-4.0)
     Table of cross sections, Am-240.
     Figures of cross sections, Am-240:  type-1:  type-2:  type-3.
       type-1: total, elastic and inelastic scattering, capture and fision cross sections
       type-2: same as type-1 but cross sections are averaged in 70 energy group intervals
       type-3: threshold reaction cross sections
Evaluated Data Libraries
     Links to the libraries. 

Parent Nuclides by Reactions in JENDL-4.0
     Am-240 (Z= 95, A=240), MT=  2 (Elastic scattering)
     Am-240 (Z= 95, A=240), MT=  4 (Inelastic scattering)
     Am-241 (Z= 95, A=241), MT= 16 (n,2n)
     Am-242 (Z= 95, A=242), MT= 17 (n,3n)
     Am-242 (Z= 95, A=242), MT= 17 (n,3n)
     Am-243 (Z= 95, A=243), MT= 37 (n,4n)