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A: Fachverband Atomphysik
A 21: Highly charged ions and their applications
A 21.5: Poster
Wednesday, March 16, 2022, 16:30–18:30, P
Sensitivity to new physics of isotope-shift studies using forbidden optical transitions of highly charged Ca ions — •Nils-Holger Rehbehn1, Michael Karl Rosner1, Hendrik Bekker1,3, Julian Berengut1,7, Piet Schmidt2,8, Steven King2, Peter Micke2,1, Ming Feng Gu6, Robert Müller2,4, Andrey Surzhykov2,4,5, and José Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 3Helmholz Institut Mainz, Johannes Gutenberg University, Germany — 4Technische Universität Braunschweig, Germany — 5Laboratory for Emerging Nanometrology Braunschweig, Germany — 6Space Science Laboratory, University of California, Berkeley, USA — 7School of Physics, University of New South Wales, Sydney, Australia — 8Leibniz Universität Hannover, Germany
A hypothetical fifth force between neutrons and electrons could be detected through so-called King plots, where the isotope shifts of two optical transitions are plotted against each other for a series of isotopes. Deviations from the expected linearity could reveal such fifth force. We explore six forbidden transitions in highly charged (HCI) calcium, where some are suited for upcoming high-precision coherent laser spectroscopy. With this number of transitions it is possible to utilize the generalized King plot method, which will remove higher-order SM nonlinearities and thus more sensitivity to unknown forces. Currently further research is conducted in HCI Xe, which has a greater number of isotopes for the King plot.