Microscopic analysis of shape-phase transitions in even-even N~90 rotating nuclei

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dc.creatorKvasil, J.
dc.creatorNazmitdinov, R. G.
dc.date2005-12-11
dc.date.accessioned2026-07-07T06:56:02Z
dc.date.available2026-07-07T06:56:02Z
dc.descriptionWe study in cranked Nilsson plus random phase approximation shape transitions in fast rotating nuclei undergoing backbending, more specifically 156Dy and 162Yb. We found that a backbending in 156Dy is correlated with the disappearance of the collective, positive signature gamma-vibrational mode in the rotating frame, and, a shape transition (from axial to nonaxial) is accompanied with a large acquiring of the gamma-deformation. We show that such a shape transition can be considered as a phase transition of the first order. In 162Yb the quasiparticle alignment dominates in the backbending and the shape transition (from axial to nonaxial) is accompanied with a smooth transition from zero to nonzero values of the gamma-deformation. We extend the classical Landau theory for rotating nuclei and show that the backbending in 162Yb is identified with the second order phase transition. A description of spectral and decay properties of the yrast states and low-lying excitations demonstrates a good agreement between our results and experimental data.
dc.description22 pages, 13 figures, 2 tables
dc.identifierhttps://arxiv.org/abs/nucl-th/0512036
dc.identifierhttp://arxiv.org/abs/nucl-th/0512036
dc.identifierPhys.Rev. C73 (2006) 014312
dc.identifierdoi:10.1103/PhysRevC.73.014312
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/106486
dc.subjectNuclear Theory
dc.titleMicroscopic analysis of shape-phase transitions in even-even N~90 rotating nuclei
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