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

Tijdschriftbijdrage - Tijdschriftartikel

The neutron-deficient ${}^{\mathrm{196,198}}$Pb 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 $B(E2)={13.1}_{-3.5}^{+4.9}$ W.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.
Tijdschrift: Journal of Physics G, Nuclear and Particle Physics
ISSN: 0954-3899
Issue: 6
Volume: 44
Jaar van publicatie:2017
BOF-publication weight:1
CSS-citation score:1
Authors from:Government, Higher Education