Low-energy Coulomb excitation of Sr 96,98 beams

Summary, in English

The structure of neutron-rich Sr96,98 nuclei was investigated by low-energy safe Coulomb excitation of radioactive beams at the REX-ISOLDE facility, CERN, with the MINIBALL spectrometer. A rich set of transitional and diagonal E2 matrix elements, including those for non-yrast structures, has been extracted from the differential Coulomb-excitation cross sections. The results support the scenario of a shape transition at N=60, giving rise to the coexistence of a highly deformed prolate and a spherical configuration in Sr98, and are compared to predictions from several theoretical calculations. The experimental data suggest a significant contribution of the triaxal degree of freedom in the ground state of both isotopes. In addition, experimental information on low-lying states in Rb98 has been obtained.

• Author: E. Clément; M. Zielińska; S. Péru; H. Goutte; S. Hilaire; A. Görgen; W. Korten; D. T. Doherty; B. Bastin; C. Bauer; A. Blazhev; N. Bree; B. Bruyneel; P. A. Butler; J. Butterworth; J. Cederkäll; P. Delahaye; A. Dijon; A. Ekström; C. Fitzpatrick; C. Fransen; G. Georgiev; R. Gernhäuser; H. Hess; J. Iwanicki; D. G. Jenkins; A. C. Larsen; J. Ljungvall; R. Lutter; P. Marley; K. Moschner; P. J. Napiorkowski; J. Pakarinen; A. Petts; P. Reiter; T. Renstrøm; M. Seidlitz; B. Siebeck; S. Siem; C. Sotty; J. Srebrny; I. Stefanescu; G. M. Tveten; J. Van De Walle; M. Vermeulen; D. Voulot; N. Warr; F. Wenander; A. Wiens; H. De Witte; K. Wrzosek-Lipska
• Department/s: Nuclear physics
• Publishing year: 2016-11-28
• Language: English
• Publication/Series: Physical Review C - Nuclear Physics
• Volume: 94
• Issue: 5
• Links: http://dx.doi.org/10.1103/PhysRevC.94.054326
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0556-2813