Microscopic analysis of nuclear quantum phase transitions in the N~90 region

Li, Z. P. and Nikšić, Tamara and Vretenar, Dario and Meng, Jie and Lalazissis, G. A. and Ring, Peter (2009) Microscopic analysis of nuclear quantum phase transitions in the N~90 region. Physical Review C, 79 (5). pp. 54301-14. ISSN 0556-2813

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The analysis of shape transitions in Nd isotopes, based on the framework of relativistic energy-density functionals and restricted to axially symmetric shapes in T. Nikšić, D. Vretenar, G. A. Lalazissis, and P. Ring [Phys. Rev. Lett. 99, 092502 (2007)], is extended to the region Z=60, 62, 64 with N[approximate]90 and includes both beta and gamma deformations. Collective excitation spectra and transition probabilities are calculated starting from a five-dimensional Hamiltonian for quadrupole vibrational and rotational degrees of freedom, with parameters determined by constrained self-consistent relativistic mean-field calculations for triaxial shapes. The results reproduce available data and show that there is an abrupt change of structure at N=90 that can be approximately characterized by the X(5) analytic solution at the critical point of the first-order quantum phase transition between spherical and axially deformed shapes.

Item Type: Article
Date: May 2009
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2009) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1010
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 29 May 2014 20:20
Last Modified: 01 Jun 2014 07:54
URI: http://digre.pmf.unizg.hr/id/eprint/1971

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