Evidence for a smooth onset of deformation in the neutron-rich Kr isotopes

M. Albers, N. Warr, A. Blazhev, J. Jolie, C. Bernards, L. Bettermann, M. Cappellazzo, C. Fransen, M. Hackstein, S. Heinze, H. Hess, J. Litzinger, K. Moschner, M. Pfeiffer, D. Radeck, P. Reiter, M. Rudigier, M. Seidlitz, B. Siebeck, P. ThöleT. Thomas, K.O. Zell, K. Nomura, T. Otsuka, D. Mücher, V. Bildstein, R. Gernhäuser, R. Krücken, K. Nowak, K. Wimmer, B. Bastin, I. Darby, H. De Witte, J. Diriken, M. Huyse, P. Van Duppen, C. Bauer, T. Kröll, M. Scheck, J. Butterworth, D. Jenkins, B.S. Nara Singh, M. Vermeulen, R. Wadsworth, J. Cederkäll, J. Pakarinen, D. Voulot, F. Wenander, D. Cline, S. Das Gupta, J. M. Daugas, T. Davinson, D. Filipescu, N. Marginean, C. Mihai, E. Fiori, G. Georgiev, L.P. Gaffney, S. Rigby, J. Konki, M. Kowalczyk, P. Napiorkowski, M. Zielinska, R. Lutter, L.M. Robledo, R. Rodríguez-Guzmán, P. Sarriguren, G. Simpson, J. Van De Walle

Research output: Contribution to journalArticlepeer-review

Abstract

The neutron-rich nuclei Kr94,96 were studied via projectile Coulomb excitation at the REX-ISOLDE facility at CERN. Level energies of the first excited 2 states and their absolute E2 transition strengths to the ground state are determined and discussed in the context of the E(21+) and B(E2;21+→01+) systematics of the krypton chain. Contrary to previously published results no sudden onset of deformation is observed. This experimental result is supported by a new proton-neutron interacting boson model calculation based on the constrained Hartree-Fock-Bogoliubov approach using the microscopic Gogny-D1M energy density functional.
Original languageEnglish
JournalPhysical Review Letters
Volume108
Issue number6
DOIs
Publication statusPublished - 10 Feb 2012

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