Octupole transitions in the 208Pb region

Zs Podolyák, C. M. Shand, E. Wilson, B. A. Brown, H. Grawe, C. J. Chiara, S. Zhu, B. Fornal, R. V.F. Janssens, M. Bowry, M. Bunce, M. P. Carpenter, N. Cieplicka, A. Y. Deo, G. D. Dracoulis, C. R. Hoffman, R. S. Kempley, F. G. Kondev, G. J. Lane, T. LauritsenG. Lotay, M. W. Reed, P. H. Regan, C. Rodríguez Triguero, D. Seweryniak, B. Szpak, P. M. Walker

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    11 Citations (Scopus)

    Abstract

    The 208Pb region is characterised by the existence of collective octupole states. Here we populated such states in 208Pb + 208Pb deep-inelastic reactions. γ-ray angular distribution measurements were used to infer the octupole character of several E3 transitions. The octupole character of the 2318 keV 17- 14+ in 208Pb, 2485 keV 19/2- 13/2+ in 207Pb, 2419 keV 15/2- 9/2+ in 209Pb and 2465 keV 17/2+ 11/2- in 207Tl transitions was demonstrated for the first time. In addition, shell model calculations were performed using two different sets of two-body matrix elements. Their predictions were compared with emphasis on collective octupole states.

    Original languageEnglish
    Article number012010
    JournalJournal of Physics: Conference Series
    Volume580
    Issue number1
    DOIs
    Publication statusPublished - 2015
    Event11th International Spring Seminar on Nuclear Physics: Shell Model and Nuclear Structure - Achievements of the Past Two Decades - Ischia, Italy
    Duration: 12 May 201416 May 2014

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