95-Am-239
Spin
Level energy(keV) Spin & Parity
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ground state (5/2)-
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)
239.053024699 ± 0.000002596 (amu) [mass excess = 49392.190 ± 2.419 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
-1756.255 ± 54.058 (keV)
Strong Gamma-rays from Decay of Am-239 (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
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209.8 3.5 EC
228.18 11.3 EC
277.60 15. EC
48.8 5.E-03 Alpha
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*: 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
A 11.9 H 1
EC 11.9 H 1
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
Am-240 (Z= 95, A=240), MT= 16 (n,2n)
Am-241 (Z= 95, A=241), MT= 17 (n,3n)
Am-242 (Z= 95, A=242), MT= 37 (n,4n)
Am-242 (Z= 95, A=242), MT= 37 (n,4n)