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Probing the 11Li halo structure through ß-decay into the 11Be*(18 MeV) state

Borge, M. J. G. and Grigorenko, L. and Guillemaud-Mueller, D. and Hornshoj, P. and Humbert, F. and Jonson, B. and Leth, T. E. and Martinez Pinedo, G. and Mukha, I. and Nilsson, T. and Nyman, G. and Riisager, K. and Schrieder, G. and Smedberg, M. H. and Tengblad, O. and Zhukov, M. V. (1997):
Probing the 11Li halo structure through ß-decay into the 11Be*(18 MeV) state.
In: Nuclear Physics A, Elsevier, pp. 199-208, 613, (3), ISSN 0375-9474,
[Article]

Abstract

An experimental study of r-delayed charged particles (H, He, Be) from llLi shows a r-feeding to an excited state at 18.15(15) MeV in llBe with a large Gamow-Teller strength, BeT ~> 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 l°Beg.s, is observed. We suggest that the measured partial width may be sensitive to the (pu2) 2 component in the HLi halo. A rough estimate indicates that the (Pl/2) 2 component is not the dominant one in the halo wave-function.

Item Type: Article
Erschienen: 1997
Creators: Borge, M. J. G. and Grigorenko, L. and Guillemaud-Mueller, D. and Hornshoj, P. and Humbert, F. and Jonson, B. and Leth, T. E. and Martinez Pinedo, G. and Mukha, I. and Nilsson, T. and Nyman, G. and Riisager, K. and Schrieder, G. and Smedberg, M. H. and Tengblad, O. and Zhukov, M. V.
Title: Probing the 11Li halo structure through ß-decay into the 11Be*(18 MeV) state
Language: English
Abstract:

An experimental study of r-delayed charged particles (H, He, Be) from llLi shows a r-feeding to an excited state at 18.15(15) MeV in llBe with a large Gamow-Teller strength, BeT ~> 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 l°Beg.s, is observed. We suggest that the measured partial width may be sensitive to the (pu2) 2 component in the HLi halo. A rough estimate indicates that the (Pl/2) 2 component is not the dominant one in the halo wave-function.

Journal or Publication Title: Nuclear Physics A
Volume: 613
Number: 3
Publisher: Elsevier
Divisions: 05 Department of Physics
Date Deposited: 20 Nov 2008 08:21
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