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

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Scheck, M, Gaffney, LP ORCID: 0000-0002-2938-3696, Butler, PA ORCID: 0000-0001-6080-9205, Hayes, AB, Wenander, F, Albers, M, Bastin, B, Bauer, C, Blazhev, A, Boenig, S et al (show 43 more authors) , Bree, N, Cederkall, J, Chupp, T, Cline, D, Cocolios, TE, Davinson, T, De Witte, H, Diriken, J, Grahn, T, Herzan, A, Huyse, M, Jenkins, DG, Joss, DT ORCID: 0000-0001-5763-8767, Kesteloot, N, Konki, J, Kowalczyk, M, Kroell, Th, Kwan, E, Lutter, R, Moschner, K, Napiorkowski, P, Pakarinen, J, Pfeiffer, M, Radeck, D, Reiter, P, Reynders, K, Rigby, SV, Robledo, LM, Rudigier, M, Sambi, S, Seidlitz, M, Siebeck, B, Stora, T, Thoele, P, Van Duppen, P, Vermeulen, MJ, von Schmid, M, Voulot, D, Warr, N ORCID: 0000-0001-7275-1063, Wimmer, K, Wrzosek-Lipska, K, Wu, CY and Zielinska, M (2015) Do nuclei go pear-shaped? Coulomb excitation of ²²⁰Rn and ²²⁴Ra 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 (E<inf>beam</inf>: 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 Item (Unspecified)
Uncontrolled Keywords:	5106 Nuclear and Plasma Physics, 5110 Synchrotrons and Accelerators, 51 Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	03 Aug 2016 07:32
Last Modified:	23 May 2026 00:16
DOI:	10.1051/epjconf/20159301038
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3002717
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