Phenomenological description of non-axial shapes of some doubly even neutron deficient barium isotopes

The evolution of non-axial shapes and rotational structure in even-even 122-132Ba isotopes has been investigated microscopically with the application of a triaxial projected shell model (TPSM). Based on calculations, the shape instability and softness towards γ deformation are predicted for these is...

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Bibliographic Details
Published in:Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2020-07, Vol.47 (7), p.75103
Main Authors: Bakshi, Ridham, Gupta, Surbhi, Singh, Suram, Bharti, Arun, Bhat, G H, Sheikh, J A
Format: Article
Language:English
Subjects:
backbending
band diagram
staggering in γ bands
transition probabilities
triaxial projected shell model
triaxiality
yrast spectra
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Summary:The evolution of non-axial shapes and rotational structure in even-even 122-132Ba isotopes has been investigated microscopically with the application of a triaxial projected shell model (TPSM). Based on calculations, the shape instability and softness towards γ deformation are predicted for these isotopes. In the present work, the application of three-dimensional angular-momentum projection on multi-quasiparticle configurations, constructed from the triaxially deformed mean field, provides a reliable description of the yrast and near yrast structure in these nuclei. The theoretically obtained backbends demonstrate the importance of decoupling of multi-quasiparticle states for these nuclei. The uniform behaviour of transition probabilities B(E21+→01+), shown by the present calculations, authenticate the global validity of Grodzin's product rule. Besides this, the deformation systematics and odd-even staggering in γ bands have also been discussed in the present work.
ISSN:0954-3899
1361-6471
DOI:10.1088/1361-6471/ab81dd