Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10722855 | Physics Letters B | 2011 | 6 Pages |
Abstract
Neutron rich nuclei around 48Ca have been measured with the CLARA-PRISMA setup, making use of 48Ca on 64Ni binary reactions, at 5.9 MeV/A. Angular distributions of γ rays give evidence, in several transfer channels, for a large spin alignment (â70%) perpendicular to the reaction plane, making it possible to firmly establish spin and parities of the excited states. In the case of 49Ca, states arising from different types of particle-core couplings are, for the first time, unambiguously identified on basis of angular distribution, polarization and lifetime measurements. Shell model and particle-vibration coupling calculations are used to pin down the nature of the states. Evidence is found for the presence, in the same excitation energy region, of two types of coupled states, i.e. single particle coupled to either 48Ca or 50Ca simple configurations, and particle-vibration coupled states based on the 3â phonon of 48Ca.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
D. Montanari, S. Leoni, D. Mengoni, G. Benzoni, N. Blasi, G. Bocchi, P.F. Bortignon, A. Bracco, F. Camera, G. Colò, A. Corsi, F.C.L. Crespi, B. Million, R. Nicolini, O. Wieland, J.J. Valiente-Dobon, L. Corradi, G. de Angelis, G. Pollarolo,