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1.	Clément, E., et al. (författare) Low-energy Coulomb excitation of Sr 96,98 beams 2016 Ingår i: Physical Review C - Nuclear Physics. - 0556-2813. ; 94:5, s. 054326- Tidskriftsartikel (refereegranskat)abstract 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.
2.	Clément, E, et al. (författare) Spectroscopic Quadrupole Moments in ^{96,98}Sr: Evidence for Shape Coexistence in Neutron-Rich Strontium Isotopes at N=60. 2016 Ingår i: Physical Review Letters. - 1079-7114. ; 116:2 Tidskriftsartikel (refereegranskat)abstract 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.

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Typ av publikation: tidskriftsartikel (2)

Typ av innehåll: refereegranskat (2)

Författare/redaktör: Butterworth, J. (2); Bauer, C (2); Zielinska, M (2); Pakarinen, J. (2); Bruyneel, B. (2); Clement, E. (2); visa fler...; Gernhäuser, R. (2); Görgen, A. (2); Hess, H. (2); Korten, W. (2); Ljungvall, J. (2); Reiter, P. (2); Warr, N. (2); Wiens, A. (2); Blazhev, A. (2); Moschner, K. (2); Jenkins, D. G. (2); Georgiev, G (2); Stefanescu, I. (2); Hilaire, S. (2); Péru, S. (2); Doherty, D. T. (2); Fransen, C. (2); Wenander, F. (2); Delahaye, P. (2); Lutter, R. (2); Marley, P. (2); Petts, A. (2); Voulot, D. (2); De Witte, H (2); Dijon, A. (2); Bree, N. (2); Wrzosek-Lipska, K (2); Bastin, B (2); Butler, P A (2); Fitzpatrick, C (2); Larsen, A C (2); Napiorkowski, P J (2); Siem, S (2); Srebrny, J (2); Tveten, G M (2); Van de Walle, J (2); Siebeck, B. (2); Seidlitz, M. (2); Iwanicki, J. (2); Goutte, H. (2); Renstrøm, T. (2); Cederkäll, J. (1); Ekström, A. (1); Ekström, Andreas (1); visa färre...

Lärosäte: Lunds universitet (2); Chalmers tekniska högskola (1)

Språk: Engelska (2)

Forskningsämne (UKÄ/SCB): Naturvetenskap (2)

År: 2016 (2)

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