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



Pakarinen, J, Grahn, T, Gaffney, LP ORCID: 0000-0002-2938-3696, Algora, A, Bauer, C, Blazhev, A, Bree, N, Cocolios, TE, De Witte, H, Diriken, J
et al (show 28 more authors) (2017) Collectivity in Pb-196,Pb-198 isotopes probed in Coulomb-excitation experiments at REX-ISOLDE. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 44 (6). 064009-064009.

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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.

Item Type: Article
Uncontrolled Keywords: Coulomb excitation, radioactive ion beams, gamma-ray spectroscopy, gamma transitions and level energies
Depositing User: Symplectic Admin
Date Deposited: 15 Mar 2018 13:43
Last Modified: 19 Jan 2023 06:38
DOI: 10.1088/1361-6471/aa6753
Open Access URL: http://urn.fi/URN:NBN:fi:jyu-201705182410
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3019063