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Título : Probing the Li-11 halo structure through β-decay into the Be-11(*) (18 MeV) state
Autor : 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.
Palabras clave : 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
Fecha de publicación : 3-Feb-1997
Editor: Elsevier
Citación : Nuclear Physics A 613(3): 199-208 (1997)
Resumen: 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.
Descripción : 10 pages, 1 table, 4 figures.-- PACS nrs.: 23.40.Hc; 27.20.+n.
Versión del editor: http://dx.doi.org/10.1016/S0375-9474(96)00434-4
URI : http://hdl.handle.net/10261/10243
ISSN: 0375-9474
DOI: 10.1016/S0375-9474(96)00434-4
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