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Browsing Department of Physics by Subject "AFRODITE (AFRican Omnipurpose Detector for Innovative Techniques and Experiments)"
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- ItemMultiple chiral bands in 193Tl(Stellenbosch : Stellenbosch University, 2016-03) Ndayishimye, Joram; Wyngaardt, Shaun M.; Lawrie, Elena A.; Stellenbosch University. Faculty of Science. Dept. of PhysicsENGLISH ABSTRACT : In order to extend knowledge about chirality in A ∼ 190 mass region, experiments were performed at iThemba LABS for γ−spectroscopy studies in 192,193Tl. Previous level scheme of 193Tl was considerably modified and extended. Level scheme of 192Tl was also significantly extended. Spins and parities were assigned to most of the levels. The yrast band in 192Tl is associated with πh9/2⊗νi13/2 configuration which is suitable for chiral symmetry. A side band with close excitation energies was observed, suggesting that the two bands in 192Tl might form a chiral pair. More interestingly three bands in 193Tl have similar properties and were associated with the same πh9/2 ⊗νi13/2 2. These bands might represent a multiplet of chiral bands in 193Tl. Theoretical calculations using the Cranked Nilsson-Strutinsky (CNS) model, the multi-particle rotor (MPR) model, and the two-quasiparticle-plus-triaxial rotor model (TQPRM) support the presence of chiral symmetry in 192,193Tl.