alpha decay study of 182,184Tl

Celine Van Beveren, A N Andreyev, Thomas Elias Cocolios, Ruben P De Groote, D Fedorov, Valentin N Fedosseev, Rafael Ferrer, Lars Ghys, Mark Huyse, Köster Ulli, Joseph Lane, Valentina Liberati, Kara M Lynch, Bruce A Marsh, P.L. Molkanov, T.J. Procter, Elisa Rapisarda, K. Sandhu, Maxim Seliverstov, Piet Van DuppenMartin Venhart, M. Veselsky

    Research outputpeer-review


    alpha-decay spectroscopy of 182,184Tl has been performed at the CERN Isotope Separator On-Line (ISOLDE) facility. New fine structure alpha-decays have been observed for both isotopes. alpha-branching ratios of 0.089(19)%, 0.047(6)% and 1.22(17)% have been deduced for the (10-), (7+) and (2+) states respectively in 184Tl and a lower limit of 0.63(7)% for the alpha-branching ratio of 182Tl. A half-life of 9.5(2) s has been extracted for the (2+) state in 184Tl. For 182Tl a half-life of 1.9(1) s has been deduced. Using alpha-gamma coincidence analysis, multiple gamma-rays were observed de-exciting levels in 178;180Au fed by 182;184Tl decays. However, due to the complex fine-structure decays and limited knowledge about the structure of the daughter nuclei, only partial alpha-decay schemes could be constructed for both isotopes. Reduced widths have been calculated and are compared with values obtained in neighboring odd and even thallium isotopes.
    Original languageEnglish
    Article number025102
    Number of pages22
    JournalJournal of Physics G: Nuclear and Particle Physics
    Issue number2
    StatePublished - 8 Jan 2016

    Cite this