• Open Access

Large Shape Staggering in Neutron-Deficient Bi Isotopes

A. Barzakh et al.
Phys. Rev. Lett. 127, 192501 – Published 2 November 2021

Abstract

The changes in the mean-square charge radius (relative to Bi209), magnetic dipole, and electric quadrupole moments of Bi187,188,189,191 were measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). A large staggering in radii was found in Bi187,188,189g, manifested by a sharp radius increase for the ground state of Bi188 relative to the neighboring Bi187,189g. A large isomer shift was also observed for Bi188m. Both effects happen at the same neutron number, N=105, where the shape staggering and a similar isomer shift were observed in the mercury isotopes. Experimental results are reproduced by mean-field calculations where the ground or isomeric states were identified by the blocked quasiparticle configuration compatible with the observed spin, parity, and magnetic moment.

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  • Received 19 August 2021
  • Revised 1 October 2021
  • Accepted 8 October 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.192501

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

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Vol. 127, Iss. 19 — 5 November 2021

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