Evolution of Octupole Deformation in Radium Nuclei from Coulomb Excitation of Radioactive ^{222}Ra and ^{228}Ra Beams.



Butler, PA, Gaffney, LP ORCID: 0000-0002-2938-3696, Spagnoletti, P, Abrahams, K, Bowry, M, Cederkäll, J, de Angelis, G, De Witte, H, Garrett, PE, Goldkuhle, A
et al (show 33 more authors) (2020) Evolution of Octupole Deformation in Radium Nuclei from Coulomb Excitation of Radioactive ^{222}Ra and ^{228}Ra Beams. Physical review letters, 124 (4).

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Abstract

There is sparse direct experimental evidence that atomic nuclei can exhibit stable "pear" shapes arising from strong octupole correlations. In order to investigate the nature of octupole collectivity in radium isotopes, electric octupole (E3) matrix elements have been determined for transitions in ^{222,228}Ra nuclei using the method of sub-barrier, multistep Coulomb excitation. Beams of the radioactive radium isotopes were provided by the HIE-ISOLDE facility at CERN. The observed pattern of E3 matrix elements for different nuclear transitions is explained by describing ^{222}Ra as pear shaped with stable octupole deformation, while ^{228}Ra behaves like an octupole vibrator.

Item Type: Article
Uncontrolled Keywords: collective levels, electromagnetic transitions, nuclear structure and decays, nuclear tests of fundamental interactions
Depositing User: Symplectic Admin
Date Deposited: 06 Feb 2020 09:01
Last Modified: 16 Jan 2021 10:28
DOI: 10.1103/physrevlett.124.042503
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3073572