Spectroscopy of reflection-asymmetric nuclei with relativistic energy density functionals

Xia, S. Y. and Tao, H. and Lu, Y. and Li, Z. P. and Nikšić, Tamara and Vretenar, Dario (2017) Spectroscopy of reflection-asymmetric nuclei with relativistic energy density functionals. Physical Review C, 96 (5). pp. 54303-14. ISSN 2469-9985

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Abstract

Quadrupole and octupole deformation energy surfaces, low-energy excitation spectra, and transition rates in 14 isotopic chains: Xe, Ba, Ce, Nd, Sm, Gd, Rn, Ra, Th, U, Pu, Cm, Cf, and Fm, are systematically analyzed using a theoretical framework based on a quadrupole-octupole collective Hamiltonian (QOCH), with parameters determined by constrained reflection-asymmetric and axially symmetric relativistic mean-field calculations. The microscopic QOCH model based on the PC-PK1 energy density functional and δ-interaction pairing is shown to accurately describe the empirical trend of low-energy quadrupole and octupole collective states, and predicted spectroscopic properties are consistent with recent microscopic calculations based on both relativistic and nonrelativistic energy density functionals. Low-energy negative-parity bands, average octupole deformations, and transition rates show evidence for octupole collectivity in both mass regions, for which a microscopic mechanism is discussed in terms of evolution of single-nucleon orbitals with deformation.

Item Type: Article
Date: 2017
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2017 American Physical Society. Received 1 August 2017; revised manuscript received 1 October 2017; published 6 November 2017.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 12 Mar 2018 08:52
Last Modified: 12 Mar 2018 08:52
URI: http://digre.pmf.unizg.hr/id/eprint/5787

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