ISOLDE Seminar

Alpha decay, beta-delayed fission and laser spectroscopy at CERN ISOLDE - The impact of the GSI target laboratory on the ISOLDE physics program

by Thomas Elias Cocolios (University of Manchester (GB))

26-1-022 (CERN)



The CERN ISOLDE facility provides low-energy radioactive ion beams of excellent quality across the nuclear landscape. In the neutron-deficient lead region, an extensive scientific program is ongoing for the study of ground and excited state properties. In particular, the half-life and decay modes of these isotopes are observed in the KULeuven Windmill setup or the CRIS Decay Spectroscopy Station, both equipped with 20ug/cm2 foils from the GSI Target Laboratory. Those foils are used to catch the isotopes produced online; the particles emitted in the decay can then be observed externally without implanting the radioactivity in the detectors. These setups have been used to study the alpha and beta decays of Au, Hg, Tl, Pb, Bi, Po, At, Rn and Fr isotopes, as well as for selectively counting ions in laser spectroscopic studies. The KULeuven Windmill setup also allowed the study of the fragment mass distribution in the beta-delayed fission of Tl, At and Fr isotopes. In this presentation, I shall introduce the KULeuven Windmill and CRIS DSS setups at ISOLDE. I shall then report on key results from the recent experimental campaigns and their impact on the understanding of shape coexistence and fission.
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