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Closed Access item Probing the Li-11 halo structure through β-decay into the Be-11(*) (18 MeV) state

Authors:García Borge, María José
Grigorenko, L.
Guillemaud-Mueller, D.
Hornshøj, P.
Humbert, F.
Jonson, B.
Leth, T. E.
Martínez Pinedo, Gabriel
Mukha, I.
Nilsson, T.
Nyman, G.
Riisager, K.
Schrieder, G.
Smedberg, M. H.
Tengblad, Olof
Zhukov, M. V.
Keywords:Radioactivity Li-11(β-): measured β-delayed H, He, Be spectra, Energy level at 18.15 MeV in Be-11, Deduced Gamow-Teller strength and branching ratios, [Ta+p] reaction, On-line mass separation, ΔE-E telescope, [PACS] Relation with nuclear matrix elements and nuclear structure, [PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19
Issue Date:3-Feb-1997
Publisher:Elsevier
Citation:Nuclear Physics A 613(3): 199-208 (1997)
Abstract:An experimental study of β-delayed charged particles (H, He, Be) from Li-11 shows a β-feeding to an excited state at 18.15(15) MeV in Be-11 with a large Gamow-Teller strength, B-GT ≥ 1.6. Branching ratios and reduced widths of 2-, 3- and 5- particle decay channels of this state are extracted, A strong suppression of the neutron branch from the 18 MeV state to the Be-10(g.s.) is observed. We suggest that the measured partial width may be sensitive to the (p(1/2))^2 component in the Li-11 halo. A rough estimate indicates that the p(1/2)^2 component is not the dominant one in the halo wave-function.
Description:10 pages, 1 table, 4 figures.-- PACS nrs.: 23.40.Hc; 27.20.+n.
Publisher version (URL):http://dx.doi.org/10.1016/S0375-9474(96)00434-4
URI:http://hdl.handle.net/10261/10243
ISSN:0375-9474
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