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Q: Fachverband Quantenoptik und Photonik

Q 19: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)

Q 19.6: 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 Stricker^2,3, Can Patric Leichtweiß¹, Valerii Andriushkov², Dennis Renisch^2,3, Dmitry Budker^1,2, Christoph E. Düllmann^2,3,4, 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.