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SAMOP 2023 – scientific programme

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A: Fachverband Atomphysik

A 20: Poster II

A 20.9: Poster

Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof

Trapping and Cooling Thorium Ions with 40Ca+ — •Can Patric Leichtweiß1, Valerii Andriushkov2, Azer Trimeche1, Jonas Stricker2,3, Dennis Renisch2,3, Leonard Fendel3, Dmitry Budker1,2, Christoph E. Düllmann2,3,4, and Ferdinand Schmidt-Kaler11QUANTUM, 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.

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