Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 14: Highly Charged Ions
A 14.1: Vortrag
Dienstag, 7. März 2017, 14:30–14:45, HS 20
Investigations of highly charged ions with applications for optical frequency standards and metrology — •Hendrik Bekker1, Alexander Windberger1, 2, Nicky Potters1, Julian Rauch1, Julian Berengut3, Anastasia Borchevsky4, and Jose R. Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Advanced Research Center for Nanolithography, Amsterdam — 3University of New South Wales, Sydney — 4Van Swinderen Institute for Particle Physics and Gravity, Groningen
Many highly charged ions (HCI) have been proposed for use in next generation optical clocks for metrology purposes. But for these HCI, theory is not capable of predicting the energy level structures to the precision required for laser spectroscopy [1,2]. Therefore, we investigated several of the proposed HCI, which we produced, trapped, and collisionally excited in the Heidelberg electron beam ion trap. The wavelengths of subsequent fluorescence light were determined at the ppm-level using a grating spectrometer. We present our latest results for Ir17+, which features transitions with extremely high sensitivity to variation of the fine-structure constant [2,3]. Furthermore, our latest results for Pr9+ and Pr10+ are discussed. All results are used to benchmark state-of-the-art atomic theory calculations. Our investigations aim to provide a deeper insight into the suitability for metrology of the proposed HCI, and to pave the way for future laser spectroscopy.
[1] J. C. Berengut et al., Phys. Rev. Lett. 106, 210803 (2011)
[2] M. S. Safronova et al., Phys. Rev. Lett. 113, 030801 (2014)
[3] A. Windberger et al., Phys. Rev. Lett. 114, 150801 (2015)