SAMOP 2021 – wissenschaftliches Programm
MS 6.2: Vortrag
Dienstag, 21. September 2021, 14:30–14:45, H2
Advancing radiation detected resonance ionization towards heavier elements and more exotic nuclides — •Jessica Warbinek1,2, Brankica Andelić1,3, Michael Block1,2,4, Premaditya Chhetri1,4, Arno Claessens5, Rafael Ferrer5, Francesca Giacoppo1,4, Oliver T. Kaleja1,6, EunKang Kim2, Mustapha Laatiaoui2, Jeremy Lantis2, Andrew Mistry1,7, Danny Münzberg1,2,4, Steven Nothhelfer1,2,4, Sebastian Raeder1,4, Emmanuel Rey-Herme8, Elisabeth Rickert1,2,4, Jekabs Romans5, Elisa Romero-Romero2, Marine Vandebrouck8, and Piet Van Duppen5 — 1GSI Helmholtzzentrum für Schwerionenforschung, Germany — 2Johannes Gutenberg-Universität, Mainz, Germany — 3KVI-CART, Groningen, The Netherlands — 4Helmholtz Institut Mainz, Germany — 5KU Leuven, IKS, Belgium — 6Universität Greifswald, Germany — 7TU Darmstadt, Germany — 8CEA Saclay, France
RAdiadtion Detected Resonance Ionization Spectroscopy (RADRIS) is a versatile method for highly sensitive laser spectroscopy of the heaviest actinides. Here, most of the nuclides need to be produced at accelerator facilities in fusion-evaporation reactions and are studied immediately after production and separation due to their short lifetimes and low production rates of only a few atoms per second or less. Only recently, the first laser spectroscopic investigation of nobelium (Z=102) was performed by applying the RADRIS technique in a buffer-gas filled stopping cell at the GSI in Darmstadt. To expand this technique for the search of the first atomic levels in the heaviest actinide, lawrencium (Z=103), the sensitivity of this setup needs to be improved. Therefore, a new movable detector design was added increasing the RADRIS efficiency by about 75 %. Further development work was performed to enable the study of longer-lived (>1 h) and shorter-lived nuclides (<1 s) with the RADRIS method.