Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10723742 | Physics Letters B | 2011 | 4 Pages |
Abstract
Proton radioactivity from 117La was re-investigated with much improved statistics and precision. Only the ground-state proton decay (Ep=813(3) keV, T1/2=20.1(25) ms) was observed, no evidence for a previously reported isomeric proton decay was found. Prompt γ rays in 117La were identified using the Recoil-Decay Tagging method. Overall the data indicate that the proton-emitting state is associated with a KÏ=3/2+ configuration, in agreement with all the published proton-decay calculations and predictions for the ground-state configuration of 117La calculated in the framework of either adiabatic or non-adiabatic particle models. However, this is not in agreement with the most recent state-of-the-art quasi-particle non-adiabatic model calculations which predict a KÏ=7/2â configuration.
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Z. Liu, D. Seweryniak, P.J. Woods, C.N. Davids, M.P. Carpenter, T. Davinson, R.V.F. Janssens, R.D. Page, A.P. Robinson, J. Shergur, S. Sinha, X.D. Tang, F.R. Xu, S. Zhu,