SAMOP 2023 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Poster II

A 20.9: Poster

Mittwoch, 8. März 2023, 16:30–19:00, Empore Lichthof

Trapping and Cooling Thorium Ions with ⁴⁰Ca⁺ — •Can Patric Leichtweiß¹, Valerii Andriushkov², Azer Trimeche¹, Jonas Stricker^2,3, Dennis Renisch^2,3, Leonard Fendel³, Dmitry Budker^1,2, Christoph E. Düllmann^2,3,4, and Ferdinand Schmidt-Kaler¹ — ¹QUANTUM, Institute of Physics, Johannes Gutenberg-Universität Mainz, Germany — ²Helmholtz-Institut Mainz, Germany — ³Department Chemie - Standort TRIGA, Johannes Gutenberg-Universität Mainz, Germany — ⁴GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany

We are aiming for quantum logic spectroscopy (QLS) with thorium ions. We employ the trapping and cooling of thorium ions [1] in calcium crystals (TACTICa) to investigate different isotopes for the purpose of high-precision spectroscopy. After sympathetical polarization gradient cooling [2] QLS on the Th |6d7s², J=3/2>→|6d7s7p, J=5/2> transition at 402 nm will be carried out. QLS is based on the excitation of axial common modes in the Th⁺-Ca⁺ crystal, using an optical lattice generated by a pair of counterpropagating Gaussian beams or a vortex beam.

[1] K. Groot-Berning et al., Phys. Rev. A 99, (2019) 023420

[2] W. Li et al., New J. Phys. 24 (2022) 043028.