The half-lives of the 9/2(+), 13/2(+), and 15/2(+) yrast states in the neutron-rich Cu-67 nucleus were determined by using the in-beam fast-timing technique. The experimentally deduced E3 transition strength for the decay of the 9/2(+) level to the 3/2(-) ground state indicates that the wave function of this level might contain a collective component arising from the coupling of the odd proton p(3/2) with the 3(-) state in Ni-66. Theoretical interpretations of the 9/2(+) state are presented within the particle-vibration weak-coupling scheme involving the unpaired proton and the 3(-) state from Ni-66 and within shell-model calculations with a Ni-56 core using the jj44b residual interaction. The shell model also accounts reasonably well for the other measured electromagnetic transition probabilities.

Fast-timing lifetime measurements of excited states in Cu-67 / C.R. Nit¸a, D. Bucurescu, N. Marginean, M. Avrigeanu, G. Bocchi, S. Bottoni, A. Bracco, A.M. Bruce, G. Cata Danil, G. Colo, D. Deleanu, D. Filipescu, D.G. Ghit¸a, T. Glodariu, S. Leoni, C. Mihai, P.J.R. Mason, R. Marginean, A. Negret, D. Pantelica, Z. Podolyak, P.H. Regan, T. Sava, L. Stroe, S. Toma, C.A. Ur, A.E. Wilson. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 89:6(2014), pp. 064314.1-064314.8. [10.1103/PhysRevC.89.064314]

Fast-timing lifetime measurements of excited states in Cu-67

G. Bocchi
;
S. Bottoni
;
A. Bracco
;
G. Colo
;
S. Leoni
;
2014

Abstract

The half-lives of the 9/2(+), 13/2(+), and 15/2(+) yrast states in the neutron-rich Cu-67 nucleus were determined by using the in-beam fast-timing technique. The experimentally deduced E3 transition strength for the decay of the 9/2(+) level to the 3/2(-) ground state indicates that the wave function of this level might contain a collective component arising from the coupling of the odd proton p(3/2) with the 3(-) state in Ni-66. Theoretical interpretations of the 9/2(+) state are presented within the particle-vibration weak-coupling scheme involving the unpaired proton and the 3(-) state from Ni-66 and within shell-model calculations with a Ni-56 core using the jj44b residual interaction. The shell model also accounts reasonably well for the other measured electromagnetic transition probabilities.
Settore FIS/04 - Fisica Nucleare e Subnucleare
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/499131
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