Hannover 2020 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 9: Mass Spectrometry Posters

MS 9.6: Poster

Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof

Studies of lanthanide desorption for laser spectroscopic investigations of the heaviest actinides — •Sebastian Raeder1,2, Michael Block1,2,3, Premaditya Chhetri1,2, Katherine Diaz1, Francesca Giacoppo1,2, Mustapha Laatiaoui1,3, and Tobias Murböck1,41HI Mainz — 2GSI, Darmstadt — 3JGU Mainz — 4TRIUMF, Vancouver

Laser spectroscopic investigations on the heaviest elements allow for a deeper understanding of fundamental atomic and nuclear properties. Due to relativistic effects on the atomic electron shell, the configuration of the atomic ground state , for instance, may differ for an element with respect to its lighter homologue, like in element 103, lawrencium. Only precise determination of the first ionization potential or a hyperfine structure measurement will help to unambiguously characterize the atomic ground state.
The sensitive RAdiation Detected Resonance Ionization Spectroscopy (RADRIS) technique allowed studying the element nobelium (No, Z=102), the only element with Z>100 for which atomic spectroscopy was performed to date. Crucially, the RADRIS technique relies on a fast and complete desorption of collected atoms from a catcher filament. Therefore an off-line mass spectrometry setup was developed to study the desorption behaviour of lutetium, the isolectronic homologue of Lr, from different filament materials as well as the competing process of surface ionization. In this contribution, first results of theses desorption studies will be presented along with the prospects of laser-spectroscopic investigations on lawrencium.

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