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

Summary, in English

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.

• Author: M. Albers; N. Warr; K. Nomura; A. Blazhev; J. Jolie; D. Mücher; B. Bastin; C. Bauer; C. Bernards; L. Bettermann; V. Bildstein; J. Butterworth; M. Cappellazzo; J. Cederkäll; D. Cline; I. Darby; S. Das Gupta; J. M. Daugas; T. Davinson; H. De Witte; J. Diriken; D. Filipescu; E. Fiori; C. Fransen; L. P. Gaffney; G. Georgiev; R. Gernhäuser; M. Hackstein; S. Heinze; H. Hess; M. Huyse; D. Jenkins; J. Konki; M. Kowalczyk; T. Kröll; R. Krücken; J. Litzinger; R. Lutter; N. Marginean; C. Mihai; K. Moschner; P. Napiorkowski; B. S. Nara Singh; K. Nowak; T. Otsuka; J. Pakarinen; M. Pfeiffer; D. Radeck; P. Reiter; S. Rigby; L. M. Robledo; R. Rodríguez-Guzmán; M. Rudigier; P. Sarriguren; M. Scheck; M. Seidlitz; B. Siebeck; G. Simpson; P. Thöle; T. Thomas; J. Van De Walle; P. Van Duppen; M. Vermeulen; D. Voulot; R. Wadsworth; F. Wenander; K. Wimmer; K. O. Zell; M. Zielinska
• Publishing year: 2012-02-10
• Language: English
• Publication/Series: Physical Review Letters
• Volume: 108
• Issue: 6
• Links: http://dx.doi.org/10.1103/PhysRevLett.108.062701
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0031-9007