First use of post-accelerated isomeric beams for Coulomb excitations studies of odd-odd nuclei around N=40

International Journal of Modern Physics E

15
1505
(2006)
G. Georgiev, I. Stefanescu, D.L. Balabanski, P. Butler, J. Cederkäll, T. Davinson, P. Delahaye, V.N. Fedosseev, L.M. Fraile, S. Franchoo, K. Gladnishki, K. Heyde, M. Huyse, O. Ivanov, J. Iwanicki, Th. Kröll, U. Köster, A. Lagoyannis, G. Lo Bianco, A. De Maesschalck, A. Saltarelli, T. Sieber, N. Smirnov, P. Van Duppen, N. Warr, F. Wenander, J. Van De Walle, and the REX-ISOLDE and MINIBALL Collaborations

We report on the first use of post-accelerated radioactive isomeric beams. Long-lived isomeric states in 68Cu and 70Cu have been produced and separated at ISOLDE, CERN. Subsequently they were post-accelerated to 2.86 MeV/u and sent to a target in the center of the MINIBALL spectrometer, used for the detection of the γ-rays of interest. The preliminary results from the Coulomb excitation of the Iπ=6-, 1+ states in 68Cu and the Iπ=6- one in 70Cu, compared to a large-scale shell model calculations, hint the importance of the excitations across the Z=28 gap for the understanding of the nuclear structure in the neutron-rich N=40 region.

DOI
10.1142/S0218301306005095
Published on
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