Hannover 2020 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 13: New Developments and Techniques
MS 13.2: Talk
Thursday, March 12, 2020, 15:30–15:45, f128
A new gas-jet setup for laser spectroscopy of transfermium elements — •Steven Nothhelfer1,2,3, Michael Block1,2,3, Premaditya Chhetri1,5, Rafael Ferrer4, Sandro Kraemer4, Mustapha Laatiaoui2,3, Sebastian Raeder1,2, Fabian Schneider2,3, Piet Van Duppen4, Matthias Verlinde4, Elise Verstraelen4, and Thomas Walther5 — 1GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, DE — 2Helmholtz-Institut Mainz, DE — 3Universität Mainz, DE — 4Instituut voor Kern- en Stralingsfysica, KU Leuven, BEL — 5TU Darmstadt, DE
Experimental data on the hyperfine structure splittings of spectral lines in transfermium elements reveal valuable information about their nuclear structure. In addition, the atomic properties of transfermium elements are of special interest due to strong relativistic effects. Therefore, a new experimental online setup is under development aiming at precise investigations of atomic states in transfermium elements by laser spectroscopy in a supersonic gas-jet. During the experiment the fusion evaporation residues are stopped in a buffer gas cell after their production and separation at SHIP at GSI, Darmstadt. Subsequently, the fusion products are extracted in a supersonic gas-jet created by a de Laval-nozzle. Laser spectroscopy in this jet enables a higher spectral resolution compared to the previous RADRIS setup, granting access to nuclear moments and spins which are derived from the hyperfine structure and isotope shifts. This talk will summarize the current status of the experiment together with first results.