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MS: Fachverband Massenspektrometrie
MS 6: New Developments
MS 6.4: Vortrag
Mittwoch, 16. März 2022, 15:00–15:15, MS-H9
Commissioning and status of a gas-jet apparatus for laser spectroscopy of the heaviest elements — •Jeremy Lantis1,2, Julian Auler1, Michael Block1,2,3, Premaditya Chhetri4, Arno Claessens4, Christoph E. Düllmann1,2,3, Rafael Ferrer4, Francesca Giacoppo2,3, Magdalena Kaja1, Oliver Kaleja1,3,5, Tom Kieck3, Nina Kneip1, Sandro Kraemer4, Mustapha Laatiaoui2,3, Nathalie Lecesne6, Vladimir Manea6,7, Danny Münzberg1,2,3, Steven Nothhelfer1,2,3, Jekabs Romans4, Herve Savajols6, Simon Sels4, Matou Stemmler1, Dominik Studer1, Barbara Sulignano8, Piet Van Duppen4, Marine Vandebrouck8, Thomas Walter9, Jessica Warbinek1,3, Felix Weber1, and Klaus Wendt1 — 1Johannes Gutenberg University Mainz, 55099 Mainz, Deutschland — 2Helmholtz Institute Mainz, 55099 Mainz, Germany — 3GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany — 4KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium — 5Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany — 6Grand Accélérateur National d'Ions Lourds, 14000 Caen, France — 7Laboratoire de Physique des 2 Infinis Irène Joliot Curie, 91400 Orsay, France — 8CEA Saclay, 91190 Saclay, France — 9TU Darmstadt, 64289 Darmstadt, Germany
Laser spectroscopy measurements can provide information about fundamental properties of both atomic and nuclear structure. These techniques are of particular importance for the heaviest actinides and superheavy elements, where atomic data are sparse. Recent resonance ionization spectroscopy experiments at GSI, Darmstadt have focused on in-gas-cell measurements using the RADRIS technique, with success measuring several nobelium and fermium isotopes. However, the resolution of these measurements is limited by collisional and Doppler broadening and cannot be applied to isotopes with half-lives shorter than one second. Simultaneously, work has been performed at KU Leuven performing laser spectroscopy on atoms in a hypersonic jet, allowing for high resolution measurements in an almost collision-free and reduced Doppler broadening environment. A new gas- jet apparatus has been constructed combining the sensitivity of the RADRIS technique with the resolution of in-gas jet spectroscopy to overcome these limitations. Commissioning experiments have been performed using thulium and dysprosium to optimize the experimental conditions, ensuring that the achievable resolution is sufficient for planned online experiments with nobelium. The most recent results will be presented.