74-W-179
Spin
Level energy(keV) Spin & Parity
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ground state (7/2)-
2.21930E+02 (1/2)-
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)
178.947077043 ± 0.000015694 (amu) [mass excess = -49297.416 ± 14.620 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
-2712.592 ± 26.817 (keV)
Strong Gamma-rays from Decay of W-179 (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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30.7 18. EC
133.9 0.11 EC
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101.6 8.E-04 IT
120.1 0.33 IT
221.5 8.8 IT
222.5 0.06 EC
238.7 0.23 EC
281.7 0.19 EC
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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
EC 37.05 M 16
EC 6.40 M 7
IT 6.40 M 7
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
W -180 (Z= 74, A=180), MT= 16 (n,2n)
Os-184 (Z= 76, A=184), MT= 24 (n,2nα)