Spectroscopic Quadrupole Moments inSr96,98: Evidence for Shape Coexistence in Neutron-Rich Strontium Isotopes atN=60
| Autor: | B. Bastin, C. Fransen, P. Marley, Sunniva Siem, W. Korten, P. J. Napiorkowski, P. Reiter, Conor Fitzpatrick, P. Delahaye, J. Iwanicki, R. Gernhäuser, C Sotty, K. Moschner, D. T. Doherty, N. Bree, B. Bruyneel, D. Voulot, Herbert Hess, C. Bauer, M. Vermeulen, Emyr Clement, N. Warr, Jonathan Butterworth, R. Lutter, D. G. Jenkins, J. Srebrny, M. Seidlitz, J. Libert, A Dijon, A. Blazhev, A. C. Larsen, Georgi Georgiev, P. A. Butler, Andreas Görgen, Gry Merete Tveten, H. Goutte, H. De Witte, S. Péru, Fredrik Wenander, A. Petts, Andreas Ekström, I. Stefanescu, Therese Renstrøm, M. Zielinska, J. Van de Walle, Stéphane Hilaire, Janne Pakarinen, J. Ljungvall, Andreas Wiens, B. Siebeck, K. Wrzosek-Lipska |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Isotope 010308 nuclear & particles physics Nuclear Theory General Physics and Astronomy Coulomb excitation Prolate spheroid 01 natural sciences Isotopes of strontium Nuclear magnetic resonance Hamiltonian formalism 0103 physical sciences Quadrupole Physics::Accelerator Physics Neutron Atomic physics 010306 general physics Mixing (physics) |
| Zdroj: | Physical Review Letters. 116 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.116.022701 |
| Popis: | Neutron-rich {96,98}Sr isotopes have been investigated by safe Coulomb excitation of radioactive beams at the REX-ISOLDE facility. Reduced transition probabilities and spectroscopic quadrupole moments have been extracted from the differential Coulomb excitation cross sections. These results allow, for the first time, the drawing of definite conclusions about the shape coexistence of highly deformed prolate and spherical configurations. In particular, a very small mixing between the coexisting states is observed, contrary to other mass regions where strong mixing is present. Experimental results have been compared to beyond-mean-field calculations using the Gogny D1S interaction in a five-dimensional collective Hamiltonian formalism, which reproduce the shape change at N=60. |
| Databáze: | OpenAIRE |
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