100-Fm-251
Spin
Level energy(keV) Spin & Parity
----------------------------------------
ground state (9/2-)
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)
251.081539890 ± 0.000016320 (amu) [mass excess = 75953.919 ± 15.203 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
-3012.904 ± 24.271 (keV)
Strong Gamma-rays from Decay of Fm-251 (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
----------------------------------------------------------
405.6 0.99 EC
453.1 1.45 EC
880.8 2.19 EC
358.3 0.32 Alpha
425.4 0.95 Alpha
480.4 0.39 Alpha
----------------------------------------------------------
*: 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 5.30 H 8
EC 5.30 H 8
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0