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

M. Scheck*, L. P. Gaffney, P. A. Butler, A. B. Hayes, F. Wenander, M. Albers, B. Bastin, C. Bauer, A. Blazhev, S. Boenig, N. Bree, J. Cederkall, T. Chupp, D. Cline, T. E. Cocolios, T. Davinson, H. De Witte, J. Diriken, T. Grahn, A. HerzanM. Huyse, D. G. Jenkins, D. T. Joss, N. Kesteloot, J. Konki, M. Kowalczyk, Th Kroell, E. Kwan, R. Lutter, K. Moschner, P. Napiorkowski, J. Pakarinen, M. Pfeiffer, D. Radeck, P. Reiter, K. Reynders, S. V. Rigby, L. M. Robledo, M. Rudigier, S. Sambi, M. Seidlitz, B. Siebeck, T. Stora, P. Thoele, P. Van Duppen, M. J. Vermeulen, M. Von Schmid, D. Voulot, N. Warr, K. Wimmer, K. Wrzosek-Lipska, C. Y. Wu, M. Zielinska

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish
Title of host publicationEPJ Web of Conferences
PublisherEDP Sciences
ISBN (Print)9782759817948
Publication statusPublished - 28 May 2015
Event15th International Symposium on Capture Gamma Ray Spectroscopy and Related Topics, CGS15 2014 - Dresden, Germany
Duration: 25 Aug 201429 Aug 2014


Conference15th International Symposium on Capture Gamma Ray Spectroscopy and Related Topics, CGS15 2014

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