| Literature DB >> 17501116 |
I Stefanescu1, G Georgiev, F Ames, J Aystö, D L Balabanski, G Bollen, P A Butler, J Cederkäll, N Champault, T Davinson, A De Maesschalck, P Delahaye, J Eberth, D Fedorov, V N Fedosseev, L M Fraile, S Franchoo, K Gladnishki, D Habs, K Heyde, M Huyse, O Ivanov, J Iwanicki, J Jolie, B Jonson, Th Kröll, R Krücken, O Kester, U Köster, A Lagoyannis, L Liljeby, G Lo Bianco, B A Marsh, O Niedermaier, T Nilsson, M Oinonen, G Pascovici, P Reiter, A Saltarelli, H Scheit, D Schwalm, T Sieber, N Smirnova, J Van De Walle, P Van Duppen, S Zemlyanoi, N Warr, D Weisshaar, F Wenander.
Abstract
We report on the first low-energy Coulomb excitation measurements with radioactive Ipi=6- beams of odd-odd nuclei 68,70Cu. The beams were produced at ISOLDE, CERN and were post-accelerated by REX-ISOLDE to 2.83 MeV/nucleon. Gamma rays were detected with the MINIBALL spectrometer. The 6- beam was used to study the multiplet of states (3-, 4-, 5-, 6-) arising from the pi2p3/2 nu 1g9/2 configuration. The 4- state of the multiplet was populated via Coulomb excitation and the B(E2;6--->4-) value was determined in both nuclei. The results obtained illustrate the fragile stability of the Z=28 shell and N=40 subshell closures. A comparison with large-scale shell-model calculations using the 56Ni core shows the importance of the proton excitations across the Z=28 shell gap to the understanding of the nuclear structure in the neutron-rich nuclei with N approximately 40.Entities:
Year: 2007 PMID： 17501116 DOI： 10.1103/PhysRevLett.98.122701
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161