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- Title
High-spin doublet band structures in odd–odd 194-200Tl isotopes.
- Authors
Jehangir, S.; Maqbool, I.; Bhat, G. H.; Sheikh, J. A.; Palit, R.; Rather, N.
- Abstract
The basis space in the triaxial projected shell model (TPSM) approach is generalized for odd–odd nuclei to include two-neutron and two-proton configurations on the basic one-neutron coupled to one-proton quasiparticle state. The generalization allows to investigate odd–odd nuclei beyond the band crossing region and as a first application of this development, high-spin band structures recently observed in odd–odd 194 - 200 Tl isotopes are investigated. In some of these isotopes, the doublet band structures observed after the band crossing have been conjuctured to arise from the spontaneous breaking of the chiral symmetry. The driving configuration of the chiral symmetry in these odd–odd isotopes is one-proton and three-neutrons rather than the basic one-proton and one-neutron as already observed in many other nuclei. It is demonstrated using the TPSM approach that energy differences of the doublet bands in 194 Tl and 198 Tl are, indeed, small. However, the differences in the calculated transition probabilities are somewhat larger than what is expected in the chiral symmetry limit. Experimental data on the transition probabilities is needed to shed light on the chiral nature of the doublet bands.
- Subjects
ISOTOPES; CHIRALITY of nuclear particles; SYMMETRY breaking; PROBABILITY theory
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2020, Vol 56, Issue 8, pN.PAG
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/s10050-020-00206-9