| Literature DB >> 32058764 |
P A Butler1, L P Gaffney1,2, P Spagnoletti3, K Abrahams4, M Bowry3,5, J Cederkäll6, G de Angelis7, H De Witte8, P E Garrett9, A Goldkuhle10, C Henrich11, A Illana7, K Johnston2, D T Joss1, J M Keatings3, N A Kelly3, M Komorowska12, J Konki2, T Kröll11, M Lozano2, B S Nara Singh3, D O'Donnell3, J Ojala13,14, R D Page1, L G Pedersen15, C Raison16, P Reiter10, J A Rodriguez2, D Rosiak10, S Rothe2, M Scheck3, M Seidlitz10, T M Shneidman17, B Siebeck10, J Sinclair3, J F Smith3, M Stryjczyk8, P Van Duppen8, S Vinals18, V Virtanen13,14, N Warr10, K Wrzosek-Lipska12, M Zielińska19.
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.Entities:
Year: 2020 PMID： 32058764 DOI： 10.1103/PhysRevLett.124.042503
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161