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

Abstract

The IS475 collaboration conducted Coulomb-excitation experiments with post-accelerated radioactive Rn-220 and Ra-224 beams at the REX-ISOLDE facility. The beam particles (E-beam: 2.83 MeV/u) were Coulomb excited using Ni-60, Cd-14, and Sn-120 scattering targets. De-excitation gamma-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 gamma-ray yields. The extracted <3 parallel to E3 parallel to 0(+)> matrix element allows for the conclusion that, while Rn-220 represents an octupole vibrational system, Ra-224 has already substantial octupole correlations in its ground state. This finding has i(m)plications for the search of CP-violating Schiff moments in the atomic systems of the adjacent odd-mass nuclei.

Original languageEnglish
Title of host publicationCGS15 - CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS
EditorsR Schwengner, K Zuber
Place of PublicationCEDEX A
PublisherE D P SCIENCES
Number of pages4
DOIs
Publication statusPublished - 2015
Event15th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics (CGS) - Dresden, Germany
Duration: 25 Aug 201429 Aug 2014

Publication series

NameEPJ Web of Conferences
PublisherE D P SCIENCES
Volume93
ISSN (Print)2100-014X

Conference

Conference15th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics (CGS)
CountryGermany
Period25/08/1429/08/14

Keywords

  • MOMENTS

Cite this