Broken SU(3) symmetry in deformed even-even nuclei
- Institute for Nuclear Research and Nuclear Energy, 72 Tzarigrad Road, 1784 Sofia (Bulgaria)
- Dipartimento di Scienze Fisiche, Universita di Napoli Federico II, Mostra d` Oltremare Pad. 19, I-80185, Napoli (Italy)
- Institute of Nuclear Physics, N.C.S.R. Demokritos, GR-15310 Aghia Paraskevi, Attiki (Greece)
A collective vector-boson model with broken SU(3) symmetry, in which the ground-state band and the lowest {gamma} band belong to the same irreducible representation but are nondegenerate, is applied to several deformed even-even nuclei. The model description of ground and {gamma} bands together with the corresponding B(E2) transition probabilities is investigated within a broad range of SU(3) irreducible representations ({lambda},{mu}). The calculations show that the ({lambda},{mu}) characteristics of rotational nuclei depend to a great extent on the magnitude of the SU(3) splitting between the ground and {gamma} bands. It is found that for weakly split spectra, the ground-{gamma} band coupling scheme is realized relevantly within narrow regions of {open_quotes}favored{close_quotes} ({lambda},{mu}) multiplets, while in the cases of strong splitting a description in which the ground band is situated alone in an irreducible representation is favored. The obtained results are analyzed in terms of the band-mixing interactions. The possibility for a transition between the different collective SU(3) schemes is discussed. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 496855
- Journal Information:
- Physical Review, C, Vol. 55, Issue 5; Other Information: PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
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