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MS: Fachverband Massenspektrometrie

MS 6: New Developments

MS 6.3: Talk

Wednesday, March 16, 2022, 14:45–15:00, MS-H9

New developments in radiation-detected resonance ionization towards the heaviest actinides — •Jessica Warbinek^{1, 2}, Brankica Andelić^{1, 3}, Michael Block^{1, 2, 4}, Premaditya Chhetri^{1, 4}, Arno Claessens⁵, Rafael Ferrer⁵, Francesca Giacoppo^{1, 4}, Oliver Kaleja^{1, 6}, Tom Kieck^{1, 4}, EunKang Kim², Mustapha Laatiaoui², Jeremy Lantis², Andrew Mistry^{1, 7}, Danny Münzberg^{1, 2, 4}, Steven Nothhelfer^{1, 2, 4}, Sebastian Raeder^{1, 4}, Emmanuel Rey-Herme⁸, Elisabeth Rickert^{1, 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

Laser spectroscopy can be a powerful tool to get insight into atomic and nuclear structures of exotic elements such as the heavy actinides. However, commonly applied techniques often lack the required sensitivity as most of these nuclides are very short-lived and can only be produced in atom-at-a-time quantities. The efficient and sensitive RAdiation-Detected Resonance Ionization Spectroscopy (RADRIS) method enabled the first laser spectroscopy of nobelium and it was recently applied to study a chain of fermium isotopes. To expand this technique for the search of atomic levels in the heaviest actinide, lawrencium (Z=103), the sensitivity of the setup needs to be further improved. Therefore, a new movable double-detector setup was developed, which allows an enhancement in the overall efficiency by about 60 % compared to the single-detector design. Further development work was performed to enable the study of shorter-lived (<1 s) and longer-lived (>1 h) nuclides with the RADRIS method. The most recent results on the commissioning of the new setup will be presented.