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Underlying Structure of Collective Bands and Self-Organization in Quantum Systems

T. Otsuka, Y. Tsunoda, T. Abe, N. Shimizu, and P. Van Duppen
Phys. Rev. Lett. 123, 222502 – Published 25 November 2019

Abstract

The underlying structure of low-lying collective bands of atomic nuclei is discussed from a novel perspective on the interplay between single-particle and collective degrees of freedom, by utilizing state-of-the-art configuration interaction calculations on heavy nuclei. Besides the multipole components of the nucleon-nucleon interaction that drive collective modes forming those bands, the monopole component is shown to control the resistance against such modes. The calculated structure of Sm154 corresponds to the coexistence between prolate and triaxial shapes, while that of Er166 exhibits a deformed shape with a strong triaxial instability. Both findings differ from traditional views based on β/γ vibrations. The formation of collective bands is shown to be facilitated from a self-organization mechanism.

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  • Received 24 July 2019
  • Revised 4 October 2019

DOI:https://doi.org/10.1103/PhysRevLett.123.222502

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

T. Otsuka1,2,3,*, Y. Tsunoda4, T. Abe4, N. Shimizu4, and P. Van Duppen3

  • 1Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
  • 2RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
  • 3KU Leuven, Instituut voor Kern- en Stralingsfysica, 3000 Leuven, Belgium
  • 4Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan

  • *Corresponding author. otsuka@phys.s.u-tokyo.ac.jp

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Issue

Vol. 123, Iss. 22 — 29 November 2019

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