Beyond-mean-field effects on nuclear triaxiality

Tu Ya, Yong-Shou Chen, Zao-Chun Gao, Ling Liu, and Yong-Jing Chen
Phys. Rev. C 95, 064316 – Published 19 June 2017

Abstract

The beyond-mean-field effects on nuclear triaxiality are studied by applying the projected total energy surface (PTES) calculations to the light tungsten isotopes W170178, which have been well described as prolate rotors within the mean-field approximation. The present PTES calculations have well reproduced the experimental energies of the yrast states and the available experimental transition quardrupole moment (Qt) in function of spin. In particular, the results present a considerable large triaxiality for their ground states, with an average triaxial deformation γ15. For a comparison, the total Routhian surface calculations have also been performed for these nuclei, the results show a well-established axial quadrupole deformation in their ground states. The presence of the significant triaxial deformation can be attributed to the beyond-mean-field effect as the angular momentum projection. This effect is therefore essential for a variety of mean-field approaches since it is only associated with the necessary restoration of the rotational symmetry in the laboratory frame, which is spontaneously broken in the intrinsic frame.

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  • Received 8 March 2017

DOI:https://doi.org/10.1103/PhysRevC.95.064316

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Tu Ya1,*, Yong-Shou Chen2,†, Zao-Chun Gao2,3, Ling Liu1, and Yong-Jing Chen2

  • 1School of Physics science and Technology, Shenyang Normal University, ShenYang 110034, China
  • 2China Institute of Atomic Energy, Beijing 102413, China
  • 3State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China

  • *tuya_sy@126.com
  • yschen@ciae.ac.cn

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Issue

Vol. 95, Iss. 6 — June 2017

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