| Thème(s) : |
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Physique/Physique Nucléaire Expérimentale
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| Titre : |
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Core excitations and narrow states beyond the proton dripline: The exotic nucleus 21Al |
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| Auteur : |
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N.K. Timofeyuk, B. Fernández-Domínguez, P. Descouvemont, W.N. Catford, F. Delaunay1, J.S. Thomas |
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| Laboratoire : |
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| équipe(s) de recherche : |
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Structure nucléaire |
| Résumé : |
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We present the first predictions for the widths of resonance states in a so-far unobserved exotic isotope beyond the proton dripline, 21Al. For this purpose we employ mirror symmetry between the widths of low-lying resonance states and the asymptotic normalization coefficients (ANC) of their mirror analogs. The latter are extracted from a recently measured peripheral reaction 20O(d,p)21O while the positions of resonances are estimated within a microscopic cluster model and a two-body potential model. We have found that 21Al should have two low-lying states decaying into the 20Mg+p channel and three states at higher energy, built on the 2+ core excited state and decaying into the 20Mg(2+)+p channel. The widths of all these states are much smaller than their energies, which makes experimental spectroscopic studies of this isotope beyond the proton dripline possible. |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
ou d'écriture : |
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2012 |
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| Nom du périodique : |
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| Physical Review C (Phys. Rev. C) |
| Publisher |
American Physical Society |
| ISSN |
0556-2813 (eISSN : 1089-490X) |
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| Volume : |
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86 |
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| Page/Article : |
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034305 |
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| Classification PACS : |
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21.10.Jx, 21.60.Gx, 23.50.+z, 27.30.+t |
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