Spectroscopy of odd-mass cobalt isotopes toward the N=40 subshell closure and shell-model description of spherical and deformed states

Articolo

Data di Pubblicazione:

2012

Citazione:

Spectroscopy of odd-mass cobalt isotopes toward the N=40 subshell closure and shell-model description of spherical and deformed states / F. Recchia, S.M. Lenzi, S. Lunardi, E. Farnea, A. Gadea, N. Marginean, D..R. Napoli, F. Nowacki, A. Poves, J.J.V.M. Axiotis, S. Aydin, D. Bazzacco, G. Benzoni, P.G. Bizzeti, A.M. Bizzeti-Sona, A. Bracco, D. Bucurescu, E. Caurier, L. Corradi, G.D. Angelis, F.D. Vedova, E. Fioretto, A. Gottardo, M. Ionescu-Bujor, A. Iordachescu, S. Leoni, R. Marginean, P. Mason, R. Menegazzo, D. Mengoni, B. Million, G. Montagnoli, R. Orlandi, G. Pollarolo, E. Sahin, F. Scarlassara, R.P. Singh, A.M. Stefanini, S. Szilner, C.A. Ur, O. Wieland. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 85:6(2012 Jun 06), pp. 064305.1-064305.10.

Abstract:

The neutron-rich cobalt isotopes up to A = 67 have been studied through multinucleon transfer reactions by bombarding a U-238 target with a 460-MeV Zn-70 beam. Unambiguous identification of prompt gamma rays belonging to each nucleus has been achieved using coincidence relationships with the ions detected in a high-acceptance magnetic spectrometer. The new data are discussed in terms of the systematics of the cobalt isotopes and interpreted with large-scale shell-model calculations in the fpgd model space. In particular, very different shapes can be described in Co-67, at the edge of the island of inversion at N = 40, where a low-lying highly deformed band coexists with a spherical structure.

Tipologia IRIS:

01 - Articolo su periodico

Keywords:

neutron-rich-nuclei; magnetic spectrometer; prisma; decay

Elenco autori: