Do nuclei go pear-shaped? Coulomb excitation of Rn-220 and Ra-224 at REX-ISOLDE (CERN)



Scheck, M, Gaffney, LP ORCID: 0000-0002-2938-3696, Butler, PA, Hayes, AB, Wenander, F, Albers, M, Bastin, B, Bauer, C, Blazhev, A, Boenig, S
et al (show 43 more authors) (2015) Do nuclei go pear-shaped? Coulomb excitation of Rn-220 and Ra-224 at REX-ISOLDE (CERN). In: CGS15 – Capture Gamma-Ray Spectroscopy and Related Topics, 2014-8-25 - 2014-8-29, Dresden, Germany..

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Abstract

The IS475 collaboration conducted Coulomb-excitation experiments with post-accelerated radioactive 220Rn and 224Ra beams at the REX-ISOLDE facility. The beam particles (Ebeam: 2.83 MeV/u) were Coulomb excited using 60Ni, 114Cd, and 120Sn scattering targets. De-excitation γ-rays were detected employing the Miniball array and scattered particles were detected in a silicon detector. Exploiting the Coulomb-excitation code GOSIA for each nucleus several matrix elements could be obtained from the measured γ-ray yields. The extracted {3-∥E3∥0+} matrix element allows for the conclusion that, while 220Rn represents an octupole vibrational system, 224Ra has already substantial octupole correlations in its ground state. This finding has implications for the search of CP-violating Schiff moments in the atomic systems of the adjacent odd-mass nuclei. Owned by the authors, published by EDP Sciences, 2015.

Item Type: Conference or Workshop Item (Unspecified)
Depositing User: Symplectic Admin
Date Deposited: 03 Aug 2016 07:32
Last Modified: 19 Jan 2023 07:32
DOI: 10.1051/epjconf/20159301038
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3002717