Effective field theory for collective rotations and vibrations of triaxially deformed nuclei

Q. B. Chen, N. Kaiser, Ulf-G. Meißner, and J. Meng
Phys. Rev. C 97, 064320 – Published 26 June 2018

Abstract

The effective field theory (EFT) for triaxially deformed even-even nuclei is generalized to include the vibrational degrees of freedom. The pertinent Hamiltonian is constructed up to next-to-leading order (NLO). The leading-order part describes the vibrational motion, and the NLO part couples rotations to vibrations. The applicability of the EFT Hamiltonian is examined through the description of the energy spectra of the ground state bands, γ bands, and K=4 bands in the Ru108,110,112 isotopes. It is found that, by taking into account the vibrational degrees of freedom, the deviations for high-spin states in the γ band observed in the EFT with only rotational degrees of freedom disappear. This supports the importance of including vibrational degrees of freedom in the EFT formulation for the collective motion of triaxially deformed nuclei.

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  • Received 15 March 2018

DOI:https://doi.org/10.1103/PhysRevC.97.064320

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Q. B. Chen1, N. Kaiser1, Ulf-G. Meißner2,3, and J. Meng4,5,6

  • 1Physik-Department, Technische Universität München, D-85747 Garching, Germany
  • 2Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany
  • 3Institute for Advanced Simulation, Institut für Kernphysik, Jülich Center for Hadron Physics and JARA-HPC, Forschungszentrum Jülich, D-52425 Jülich, Germany
  • 4State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
  • 5Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
  • 6Department of Physics, University of Stellenbosch, Stellenbosch, South Africa

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Issue

Vol. 97, Iss. 6 — June 2018

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