Spectroscopy of neutron-rich 168,170Dy: Yrast band evolution close to the NpNn valence maximum

P.-A. Söderström, J. Nyberg, P.H. Regan, A. Algora, G. de Angelis, S.F. Ashley, S. Aydin, D. Bazzacco, R.J. Casperson, W.N. Catford, J. Cederkall, R. Chapman, L. Corradi, C. Fahlander, E. Farnea, E. Fioretto, S.J. Freeman, A. Gadea, W. Gelletly, A. GottardoE. Grodner, C.Y. He, G.A. Jones, K. Keyes, M. Labiche, X. Liang, Z. Liu, S. Lunardi, N. Marginean, P. Mason, R. Menegazzo, D. Mengoni, G. Montagnoli, D. Napoli, J. Ollier, S. Pietri, Zs. Podolyak, G. Pollarolo, F. Recchia, E. Sahin, F. Scarlassara, R. Silvestri, J.F. Smith, K.-M. Spohr, S.J. Steer, A.M. Stefanini, S. Szilner, N.J. Thompson, G.M. Tveten, C.A. Ur, J.J. Valiente-Dobon, V. Werner, S.J. Williams, F.R. Xu, J.Y. Zhu

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    Abstract

    The yrast sequence of the neutron-rich dysprosium isotope 168Dy has been studied using multinucleon transfer reactions following collisions between a 460-MeV 82Se beam and an 170Er target. The reaction products were identified using the PRISMA magnetic spectrometer and the
    γ rays detected using the CLARA HPGe-detector array. The 2+ and 4+ members of the previously measured ground-state rotational band of
    168Dy have been confirmed and the yrast band extended up to 10+. A tentative candidate for the 4+→2+ transition in 170Dy was also identified. The data on these nuclei and on the lighter even-even dysprosium isotopes are interpreted in terms of total Routhian surface calculations and the evolution of collectivity in the vicinity of the proton-neutron valence product maximum is discussed.
    Original languageEnglish
    Article number034310
    JournalPhysical Review C
    Volume81
    Issue number3
    DOIs
    Publication statusPublished - 22 Mar 2010

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