87-Fr-220
Spin
Level energy(keV) Spin & Parity
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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)
220.012327702 ± 0.000004387 (amu) [mass excess = 11483.181 ± 4.086 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
1212.647 ± 9.069 (keV)
Strong Gamma-rays from Decay of Fr-220 (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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178.3 0.02 B-
234.5 0.01 B-
413.0 0.01 B-
44.60 0.56 Alpha
105.88 0.3 Alpha
160.73 0.38 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 27.4 S 3
B- 27.4 S 3
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0