Collectivity in 196,198Pb isotopes probed in Coulomb-excitation experiments at REX-ISOLDE

J. Pakarinen, T. Grahn, L. P. Gaffney, A. Algora, C. Bauer, A. Blazhev, N. Bree, T. E. Cocolios, H. De Witte, J. Diriken, P. Fernier, K. Hadyńska-Klk, A. Herzáň, M. Huyse, J. Iwanicki, U. Jakobsson, D. Jenkins, N. Kesteloot, J. Konki, B. LannooP. Papadakis, P. Peura, P. Rahkila, G. Rainovski, E. Rapisarda, P. Reiter, S. Sambi, M. Scheck, B. Seibeck, M. Seidlitz, T. Stora, P. Van Duppen, N. Warr, F. Wenander, M. J. Vermeulen, D. Voulot, K. Wrzosek-Lipska, M. Zielińska

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Abstract

The neutron-deficient 196,198Pb isotopes have been studied in Coulomb-excitation experiments employing the Miniball γ-ray spectrometer and radioactive ion beams from the REX-ISOLDE post-accelerator at CERN. The reduced transition probabilities of the first excited 2+ states in 196Pb and 198Pb nuclei have been measured for the first time. Values of B (E2) =18.2 -4.1+4.8 W.u. and B( E2) =13.1 -3.5 +4.9W.u., were obtained, respectively. The experiment sheds light on the development of collectivity when moving from the regime governed by the generalised seniority scheme to a region, where intruding structures, associated with different deformed shapes, start to come down in energy and approach the spherical ground state.

Original languageEnglish
Article number064009
JournalJournal of Physics G: Nuclear and Particle Physics
Volume44
Issue number6
DOIs
Publication statusPublished - 3 May 2017
Externally publishedYes

Cite this

Pakarinen, J., Grahn, T., Gaffney, L. P., Algora, A., Bauer, C., Blazhev, A., ... Zielińska, M. (2017). Collectivity in 196,198Pb isotopes probed in Coulomb-excitation experiments at REX-ISOLDE. Journal of Physics G: Nuclear and Particle Physics, 44(6), [064009]. https://doi.org/10.1088/1361-6471/aa6753