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arXiv · 0909.4841

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. Cederkäll·R. Chapman·L. Corradi·C. Fahlander·E. Farnea·E. Fioretto·S. J. Freeman·A. Gadea·W. Gelletly·A. Gottardo·E. Grodner·C. Y. He·G. A. Jones·K. Keyes·M. Labiche·X. Liang·Z. Liu·S. Lunardi·N. Mărginean·P. Mason·R. Menegazzo·D. Mengoni·G. Montagnoli·D. Napoli·J. Ollier·S. Pietri·Zs. Podolyák·G. Pollarolo·F. Recchia·E. Şahin·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-Dobón·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 multi-nucleon transfer reactions following collisions between a 460-MeV 82Se beam and a 170Er target. The reaction products were identified using the PRISMA magnetic spectrometer and the gamma 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+ to 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.

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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. Cederkäll, R. Chapman, L. Corradi, C. Fahlander, E. Farnea, E. Fioretto, S. J. Freeman, A. Gadea, W. Gelletly, A. Gottardo, E. Grodner, C. Y. He, G. A. Jones, K. Keyes, M. Labiche, X. Liang, Z. Liu, S. Lunardi, N. Mărginean, P. Mason, R. Menegazzo, D. Mengoni, G. Montagnoli, D. Napoli, J. Ollier, S. Pietri, Zs. Podolyák, G. Pollarolo, F. Recchia, E. Şahin, 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-Dobón, V. Werner, S. J. Williams, F. R. Xu, J. Y. Zhu. 2009-12-22. Spectroscopy of Neutron-Rich 168,170Dy: Yrast Band Evolution Close to the NpNn Valence Maximum. https://doi.org/10.1103/physrevc.81.034310

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