Rb 9737 60: The cornerstone of the region of deformation around A∼100

Christophe O. Sotty, Magda Zielińska, Georgi P. Georgiev, Dimiter L. Balabanski, Andrew E. Stuchbery, Andrey Blazhev, Nick Bree, Raphaël Chevrier, Subal Das Gupta, Jean Michel Daugas, Thomas Davinson, Hilde De Witte, Jan Diriken, Liam Paul Gaffney, Kerstin Geibel, K. Hadyńska-Klęk, Filip G. Kondev, Joonas Konki, Thorsten Kröll, Pascal MorelPaweł Jan Napiorkowski, Janne Pakarinen, Peter Reiter, Marcus Scheck, Michael Seidlitz, Burkhard Siebeck, Gary S. Simpson, Hans Törnqvist, Nigel V. Warr, Fredrik J.C. Wenander

    Research outputpeer-review

    19 Scopus citations


    Excited states of the neutron-rich nuclei Rb97,99 were populated for the first time using the multistep Coulomb excitation of radioactive beams. Comparisons of the results with particle-rotor model calculations provide clear identification for the ground-state rotational band of Rb97 as being built on the πg9/2 [431]3/2+ Nilsson-model configuration. The ground-state excitation spectra of the Rb isotopes show a marked distinction between single-particle-like structures below N=60 and rotational bands above. The present study defines the limits of the deformed region around A∼100 and indicates that the deformation of Rb97 is essentially the same as that observed well inside the deformed region. It further highlights the power of the Coulomb-excitation technique for obtaining spectroscopic information far from stability. The Rb99 case demonstrates the challenges of studies with very short-lived postaccelerated radioactive beams.

    Original languageEnglish
    Article number172501
    Number of pages6
    JournalPhysical review Letters
    Issue number17
    StatePublished - 20 Oct 2015

    ASJC Scopus subject areas

    • General Physics and Astronomy

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