SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 11: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)
A 11.6: Vortrag
Dienstag, 7. März 2023, 12:15–12:30, F303
Trapping and cooling Th ions with Ca ion crystal for quantum logic spectroscopy — •Azer Trimeche1, Jonas Stricker2,3, Can Patric Leichtweiß1, Valerii Andriushkov2, Dennis Renisch2,3, Dmitry Budker1,2, Christoph E. Düllmann2,3,4, and Ferdinand Schmidt-Kaler1 — 1QUATUM, Institute of Physics, Johannes Gutenberg-Universität Mainz — 2Helmholtz-Institut Mainz — 3Department of Chemistry, Johannes Gutenberg-Universität Mainz — 4GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
Thorium isotopes became of high interest in the search for new physics, and fundamental physics tests, because of their unique nuclear and atomic properties. The Trapping And Cooling of Thorium Ions in Calcium crystals (TACTICa) project develops ion trapping and spectroscopic techniques for a precise determination of the nuclear moments, hyperfine intervals, and isotope shifts with different Th isotopes. For the production, we dispose of two different sources: an ion recoil source [1] and a laser ablation source [2]. Th ions are trapped in a Ca+ crystal [3], tagged by fluorescence calorimetry technique [4], cooled down sympathetically by polarization gradient cooling of Ca+ crystal [5], and investigated by quantum logic spectroscopy technique.
[1] R. Haas et al., Hyperfine interactions 241 (2020) 25.
[2] K. Groot-Berning et al., PRA 99 (2019) 023420.
[3] K. Groot-Berning et al., PRL 123 (2019) 106802.
[4] M. Gajewski et al. PRA 106 (2022) 033108.
[5] W. Li et al., NJP 24(4) (2022) 043028.