Coupling effects in the elastic scattering of the exotic nucleus He-6 on protons

Citation
V. Lapoux et al., Coupling effects in the elastic scattering of the exotic nucleus He-6 on protons, PHYS LETT B, 517(1-2), 2001, pp. 18-24
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
517
Issue
1-2
Year of publication
2001
Pages
18 - 24
Database
ISI
SICI code
0370-2693(20010927)517:1-2<18:CEITES>2.0.ZU;2-5
Abstract
Cross sections for the elastic scattering of He-6 radioactive nuclear beam on proton targets have been measured at 38.3 Mev/nucleon. With a view to te st the ability of general optical potentials to reproduce the data for scat tering of unstable nuclei, the present results, as well as other existing d ata for He-6,He-8, have been analyzed within the framework of the microscop ic Jeukenne-Lejeune-Mahaux nucleon-nucleus potential. The angular distribut ions were found to be best reproduced by reducing the real part of the opti cal potential. This renormalization can be seen as a consequence of the com plex polarization potential produced by the coupling to the continuum due t o the weakly bound nature of the unstable nuclei. This effect can be simula ted in a phenomenological analysis by a surface potential. (C) 2001 Publish ed by Elsevier Science B.V.