Early onset of ground state deformation in neutron deficient polonium isotopes

T. E. Cocolios, W. Dexters, M. D. Seliverstov, A. N. Andreyev, S. Antalic, A. E. Barzakh, B. Bastin, J. Büscher, I. G. Darby, D. V. Fedorov, V. N. Fedosseyev, K. T. Flanagan, S. Franchoo, S. Fritzsche, G. Huber, M. Huyse, M. Keupers, U. Köster, Yu Kudryavtsev, E. ManéB. A. Marsh, P. L. Molkanov, R. D. Page, A. M. Sjoedin, I. Stefan, J. Van De Walle, P. Van Duppen, M. Venhart, S. G. Zemlyanoy, M. Bender, P. H. Heenen

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In-source resonant ionization laser spectroscopy of the even-A polonium isotopes Po192-210,216,218 has been performed using the 6p37s S25 to 6p37p P25 (λ=843.38nm) transition in the polonium atom (Po-I) at the CERN ISOLDE facility. The comparison of the measured isotope shifts in Po200-210 with a previous data set allows us to test for the first time recent large-scale atomic calculations that are essential to extract the changes in the mean-square charge radius of the atomic nucleus. When going to lighter masses, a surprisingly large and early departure from sphericity is observed, which is only partly reproduced by beyond mean field calculations. © 2011 American Physical Society.
    Original languageEnglish
    Article number052503
    JournalPhysical Review Letters
    Volume106
    Issue number5
    DOIs
    Publication statusPublished - 2 Feb 2011

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