Dec 5 – 7, 2011
Europe/Zurich timezone

Investigating shape coexistence in the lead region with in-source laser spectroscopy at ISOLDE-RILIS

Dec 6, 2011, 4:50 PM
503/1-001 - Council Chamber (CERN)

503/1-001 - Council Chamber


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Submitted Heavy nuclei


Thomas Elias Cocolios (CERN)


The competition between spherical and deformed nuclear shapes at low energy gives rise to shape coexistence in the region of the neutron-deficient lead isotopes with Z~82 and N~104 [1]. In order to determine to which extend the ground-state of those isotopes is affected by this phenomenon, a large campaign of investigation of changes in the mean-square charge radii is on-going at ISOLDE. Using the high-sensitivity of the in-source laser spectroscopy technique, which combines the ISOLDE-RILIS lasers with the Windmill alpha-decay spectroscopy setup, it has been possible to study very exotic isotopes of lead [2-3] and polonium [4-6], down to N=100 and N=107 respectively, and more recently thallium down to N=99. In this contribution, we shall review the experimental observations on lead and polonium and present the first results of the 2011 experiment on thallium. [1] A.N. Andreyev et al., Nature 403(2000)430 [2] H. De Witte et al., PRL 98(2007)112502 [3] M.D. Seliverstov et al., EPJA 41(2009)315 [4] T.E. Cocolios et al., JPG 37(2010)125103 [5] T.E. Cocolios et al., PRL 106(2011)052503 [6] M.D. Seliverstov et al., Letter in preparation

Primary author


Maxim Seliverstov (Johannes Gutenberg-Universitat)

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