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Title

Super-strong β-decay of Li-11 into Be-11* (18 MeV) state: A probe for halo p-wave component?

AuthorsMukha, I. ; García Borge, María José ; Guillemaud-Mueller, D.; Hornshøj, P.; Humbert, F.; Jonson, B.; Leth, T. E.; Martínez Pinedo, Gabriel; Nilsson, T.; Nyman, G.; Riisager, K.; Schrieder, G.; Smedberg, M. H.; Tengblad, Olof ; ISOLDE Collaboration
KeywordsDeuteron
Emission
Issue Date14-Apr-1997
PublisherElsevier
SeriesNuclear Physics A 616(1-2): 201-207 (1997)
AbstractAn experimental study of β-delayed charged particles (H, He, Be), neutrons and γ-rays that follow the Li-11 β-decay, clearly indicates a β-feeding to an exited state at 18.1 MeV in Be-11 with a large Gamow-Teller strength, B-GT greater than or equal to 1.0. The large strength of this β-transition implies a broad overlap of the Be-11* state at 18.1 MeV and the ground state of Li-11. The deduced width of this resonance is similar or equal to 1 MeV. A strong suppression of the branch from 18.1 MeV state into the Be-10+n channel is observed. This branch, with the largest decay energy, has a partial width less than 1% of the total width. A centrifugal barrier consideration fails to explain this effect. A possible consequence of the observed effect for the Li-11 structure is that the admixture of (p(1/2))(2) configuration in Li-11 might be small.
Description7 pages, 4 figures.-- Journal issue title: Radioactive Nuclear Beams.
Publisher version (URL)http://dx.doi.org/10.1016/S0375-9474(97)00089-4
URIhttp://hdl.handle.net/10261/9820
DOI10.1016/S0375-9474(97)00089-4
ISSN0375-9474
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