Large Shape Staggering in Neutron-Deficient Bi Isotopes



Barzakh, A, Andreyev, AN, Raison, C, Cubiss, JG, Van Duppen, P, Peru, S, Hilaire, S, Goriely, S, Andel, B, Antalic, S
et al (show 47 more authors) (2021) Large Shape Staggering in Neutron-Deficient Bi Isotopes. PHYSICAL REVIEW LETTERS, 127 (9). 192501-.

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Abstract

The changes in the mean-square charge radius (relative to ^{209}Bi), magnetic dipole, and electric quadrupole moments of ^{187,188,189,191}Bi were measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). A large staggering in radii was found in ^{187,188,189}Bi^{g}, manifested by a sharp radius increase for the ground state of ^{188}Bi relative to the neighboring ^{187,189}Bi^{g}. A large isomer shift was also observed for ^{188}Bi^{m}. 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.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 16 Nov 2021 08:46
Last Modified: 18 Jan 2023 21:24
DOI: 10.1103/PhysRevLett.127.192501
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3143199