Spectroscopy of reflection-asymmetric nuclei with relativistic energy density functionals

S. Y. Xia, H. Tao, Y. Lu, Z. P. Li, T. Nikšić, and D. Vretenar
Phys. Rev. C 96, 054303 – Published 6 November 2017
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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.

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  • Received 1 August 2017
  • Revised 1 October 2017

DOI:https://doi.org/10.1103/PhysRevC.96.054303

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

S. Y. Xia, H. Tao, Y. Lu, and Z. P. Li*

  • School of Physical Science and Technology, Southwest University, Chongqing 400715, China

T. Nikšić and D. Vretenar

  • Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia

  • *zpliphy@swu.edu.cn

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Issue

Vol. 96, Iss. 5 — November 2017

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