SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 33: Precision Spectroscopy of Atoms and Ions V (joint session A/Q)
A 33.6: Vortrag
Freitag, 10. März 2023, 15:45–16:00, B302
Accurate isotope shift measurements in the D1 and D2 lines of Sr+ — •Julian Palmes, Phillip Imgram, Hendrik Bodnar, Kristian König, Patrick Müller, Imke Lopp, and Wilfried Nörtershäuser — Institut für Kernphysik, TU Darmstadt, Germany
Accurate measurements of different transition frequencies in multiple isotopes allow for the determination of the isotope shift and thus the calculation of the field shift ratio f, which is an important parameter to compare experimental results with state-of-the-art atomic structure calculations. After previous measurements of the corresponding lines in isotopes of the other alkaline-earth metals Ca+ and Ba+, absolute frequency measurements of the stable Sr+ isotopes will be performed to be followed later by investigations of the 4d→5p transitions. Information on these transitions is required for an experiment on stable and short-lived Sr+ ions in a Paul trap, currently being prepared at the KU Leuven. We report on measurements of the D1 and D2 transitions, using the quasi-simultaneous collinear/anticollinear laser spectroscopy (CLS). These were carried out with the Collinear Apparatus for Laser Spectroscopy and Applied Science (COALA) at the Technical University of Darmstadt. Additionally, this method allowed for a precise observation of the hyperfine splitting of the 87Sr+ isotope. Funding by BMBF under contract 05P21RDFN1 is acknowledged.