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Coulomb Excitation of Neutron-Rich Zn Isotopes: First Observation of the 2[sub 1][sup +] State in [sup 80]Zn

J. Van de Walle ; F. Aksouh ; F. Ames ; T. Behrens ; V. Bildstein ; A. Blazhev ; J. Cederkall ; E. Clement ; T. E. Cocolios ; T. Davinson ; P. Delahaye ; J. Eberth ; A. Ekstrom ; D. V. Fedorov ; V. N. Fedosseev ; L. M. Fraile ; S. Franchoo ; R. Gernhauser ; G. Georgiev ; D. Habs ; K. Heyde ; G. Huber ; M. Huyse ; F. Ibrahim ; O. Ivanov ; J. Iwanicki ; J. Jolie ; O. Kester ; U. Koster ; T. Kroll ; R. Krucken ; M. Lauer ; A. F. Lisetskiy ; R. Lutter ; B. A. Marsh ; P. Mayet ; O. Niedermaier ; Thomas Nilsson (Institutionen för fundamental fysik, Subatomär fysik) ; M. Pantea ; O. Perru ; R. Raabe ; P. Reiter ; M. Sawicka ; H. Scheit ; G. Schrieder ; D. Schwalm ; M. D. Seliverstov ; T. Sieber ; G. Sletten ; N. Smirnova ; M. Stanoiu ; I. Stefanescu ; J.-C. Thomas ; J. J. Valiente-Dobon ; P. Van Duppen ; D. Verney ; D. Voulot ; N. Warr ; D. Weisshaar ; Fredrik Wenander ; B. H. Wolf ; M. Zielinska
Physical Review Letters Vol. 99 (2007), 14, p. 142501.
[Artikel, refereegranskad vetenskaplig]

Neutron-rich, radioactive Zn isotopes were investigated at the Radioactive Ion Beam facility REX-ISOLDE (CERN) using low-energy Coulomb excitation. The energy of the 21+ state in 78Zn could be firmly established and for the first time the 2+-->01+ transition in 80Zn was observed at 1492(1) keV. B(E2,21+-->01+) values were extracted for 74,76,78,80Zn and compared to large scale shell model calculations. With only two protons outside the Z=28 proton core, 80Zn is the lightest N=50 isotone for which spectroscopic information has been obtained to date. Two sets of advanced shell model calculations reproduce the observed B(E2) systematics. The results for N=50 isotones indicate a good N=50 shell closure and a strong Z=28 proton core polarization. The new results serve as benchmarks to establish theoretical models, predicting the nuclear properties of the doubly magic nucleus 78Ni.

Denna post skapades 2008-01-09. Senast ändrad 2014-09-02.
CPL Pubid: 65136


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Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)



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