1. Shape transitions far from stability: The nucleus 58Cr
- Author
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W. Zhimin, D. Bazzacco, A. M. Bizzeti-Sona, K. M. Spohr, A. Gadea, A. Iordachescu, S. Lunardi, B. R. Behera, P. G. Bizzeti, D. R. Napoli, C. A. Ur, S. M. Lenzi, E. Fioretto, Th. Kröll, J. F. Smith, S. J. Freeman, N. Marginean, R. Marginean, A. M. Stefanini, E. Farnea, M. Ionescu-Bujor, B. J. Varley, A. Latina, G. de Angelis, F. Scarlassara, R. Chapman, G. Montagnoli, S. Beghini, L. Corradi, M. Trotta, G. Pollarolo, M. Nespolo, D. Bucurescu, C. Rusu, A. N. Deacon, X. Liang, F. Della Vedova, and Suzana Szilner
- Subjects
Neutron-rich nuclei ,Physics ,Nuclear and High Energy Physics ,Phase transition ,Spectrometer ,Critical point (mathematics) ,IBM ,Multinucleon transfer reactions ,Shell model ,High-spin spectroscopy ,medicine.anatomical_structure ,Excited state ,medicine ,Neutron ,Interacting boson model ,Atomic physics ,Nucleus ,Excitation - Abstract
Excited states up to I π = 8 + in the neutron-rich nucleus 58Cr have been identified by using a new experimental setup composed of the large acceptance magnetic spectrometer PRISMA and the highly efficient γ-detector array CLARA. Interestingly, the excitation energy sequence of the ground-state band follows the one expected by the E ( 5 ) dynamical symmetry for a nucleus at the critical point of the shape phase transition from a spherical vibrator ( U ( 5 ) ) to a γ-soft rotor ( O ( 6 ) ). For the first time, in the same physical system, large scale shell-model calculations in the full fp shell are compared to the E ( 5 ) analytical model results and to the Interacting Boson Model. The theoretical results are in excellent agreement with the present data.
- Published
- 2006