Shape coexistence studied in 182,184Hg via the β decay of 182,184Tl

E. Rapisarda, A N {Andreyev}, S {Antalic}, A Barzakh, T. E. Cocolios, I G {Darby}, R P De Groote, H. De Witte, J Diriken, J Elseviers, D. Fedorov, V. N. Fedosseev, R. Ferrer, M. Huyse, Z. Kalaninová, U Köster, J. Lane, V. Liberati, K. M. Lynch, Bruce MarshP. L. Molkanov, D. Pauwels, T. J. Procter, D Radulov, K Sandhu, M D Seliverstov, C Van Beveren, P. Van den Bergh, P {van Duppen}, M Venhart, M Veselský, K {Wrzosek-Lipska}

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    Abstract

    The β+/EC decay of 182,184Tl to excited states in the daughter nuclei 182,184Hg has been investigated at the CERN on-line isotope mass separator facility. In both Tl nuclei two β-decaying states were observed. In the case of 184Tl, narrow-band laser spectroscopy could be used to disentangle the decay of both isomers. In 182Hg a precise energy of 335 (1) keV for the 0+ 2 state was measured together with its feeding from a tentatively proposed 2+ 3 state at 973 keV. Large conversion coefficients for the 2+ + 21 → 2 transition in 182,184Hg were measured to be 7.2 (13) and 14.2 (36), respectively, evidencing a strong E0 component.

    Original languageEnglish
    Article number074001
    JournalJournal of Physics G: Nuclear and Particle Physics
    Volume44
    Issue number7
    Early online date6 Apr 2017
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Radioactive nuclei
    • shape coexistence
    • β decay
    • γ spectroscopy

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