Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in 217,218,219At revealed by in-source laser spectroscopy

A. E. Barzakh, Cubiss James G., Andrei N. Andreyev, Maxim Seliverstov, B. Andel, Stanislav Antalic, Philippe Ascher, Dimitar Atanasov, Dietrichg Beck, Jacek Bieron, Klaus Blaum, Christopher Borgmann, Martin Breitenfeldt, L. Capponi, Thomas Elias Cocolios, Thomas Day Goodacre, Xavier Derkx, Hilde De Witte, Jytte Elseviers, Dmitry V. FedorovValentin N. Fedosseev, Stephan Fritzsche, Liam Paul Gaffney, S. George, Lars Ghys, Fritz Peter Hessberger, Mark Huyse, Nobuaki Imai, Z. Kalaninova, D. Kisler, Ulli Koester, Magdalena Kowalska, S. Kreim, Joseph F.W. Lane, Valentina Liberati, David Lunney, Kara M Lynch, Vladimir Manea, Bruce A Marsh, S. Mitsuoka, Pavel Molkanov, Y. Nagame, Dennis Neidherr, K. Nishio, S. Ota, Dieter Pauwels, Lucia Popescu, Deyan Radulov, Elisa Rapisarda, J. P. Revill, M. Rosenbusch, Ralf Erik Rossel, Sebastian Rothe, Karanjeet Sandhu, Lutz Schweikhard, Simon Sels, V.L. Truesdale, Celine Van Beveren, Paul Van den Bergh, Piet Van Duppen, Y. Wakabayashi, K. Wendt, Frank Wienholtz, B. W. Whitmore, G.L. Wilson, R.N. Wolf, Kai Zuber

    Research outputpeer-review


    Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in 217,218,219At have been measured at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy technique. Magnetic dipole and electric quadrupole moments, and changes in the nuclear mean-square charge radii, have been deduced. A large inverse odd-even staggering in radii, which may be associated with the presence of octupole collectivity, has been observed. Namely, the radius of the odd-odd isotope 218At has been found to be larger than the average of its even-N neighbors, 217,219At. The discrepancy between the additivity-rule prediction and experimental data for the magnetic moment of 218At also supports the possible presence of octupole collectivity in the considered nuclei.
    Original languageEnglish
    Article number054317
    Pages (from-to)1-9
    Number of pages9
    JournalPhysical Review C
    StatePublished - 14 May 2019

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