64-Gd-139
Spin
Level energy(keV) Spin & Parity
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ground state (9/2-)
ground state(+X)
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)
138.938130 ± 0.000210 (amu) [mass excess = -57632 ± 196 (keV) ]
[These values were derived from systematical trend]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
-9501 ± 357 (keV) [derived from systematical trend]
Strong Gamma-rays from Decay of Gd-139 (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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309.7 -- B+
322.5 -- B+
471.9 -- B+
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542.5 -- B+
553.5 -- B+
903.8 -- B+
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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(%). ]
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0