Core excitations and narrow states beyond the proton dripline: The exotic nucleus 21Al

N.K. Timofeyuk; B. Fernández-Domínguez; P. Descouvemont; W.N. Catford; F. Delaunay; J.S. Thomas

doi:10.1103/PhysRevC.86.034305

Core excitations and narrow states beyond the proton dripline: The exotic nucleus 21Al

N.K. Timofeyuk B. Fernández-Domínguez P. Descouvemont W.N. Catford F. Delaunay ¹ J.S. Thomas

1 structure nucléaire

LPCC - Laboratoire de Physique Corpusculaire de Caen

Abstract : 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.

Document type :

Journal articles

Physical Review C, American Physical Society, 2012, 86, pp.034305. <10.1103/PhysRevC.86.034305>

Domain :

Physics / Nuclear Experiment

http://hal.in2p3.fr/in2p3-00730399
Contributor : Sandrine Guesnon <>
Submitted on : Monday, September 10, 2012 - 10:41:22 AM
Last modification on : Wednesday, January 28, 2015 - 11:06:47 AM

Core excitations and narrow states beyond the proton dripline: The exotic nucleus 21Al

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