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Evidence for a smooth onset of deformation in the neutron-rich Kr isotopes |
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| Authors: | Albers M Warr N Nomura K Blazhev A Jolie J Mücher D Bastin B Bauer C Bernards C Bettermann L Bildstein V Butterworth J Cappellazzo M Cederkäll J Cline D Darby I Das Gupta S Daugas J M Davinson T De Witte H Diriken J Filipescu D Fiori E Fransen C Gaffney L P Georgiev G Gernhäuser R Hackstein M Heinze S Hess H Huyse M Jenkins D Konki J Kowalczyk M Kröll T Krücken R Litzinger J Lutter R Marginean N Mihai C Moschner K Napiorkowski P Singh B S Nara Nowak K Otsuka T Pakarinen J Pfeiffer M Radeck D Reiter P Rigby S Robledo L M Rodríguez-Guzmán R Rudigier M Sarriguren P Scheck M Seidlitz M Siebeck B |
| Affiliation: | Institut für Kernphysik, Universit?t zu K?ln, K?ln, Germany. malbers@ikp.uni-koeln.de |
| Abstract: | The neutron-rich nuclei 94,96Kr 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(2(1)(+)) and B(E2;2(1)(+)→0(1)(+)) 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. |
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