Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 64: Poster – Precision Spectroscopy of Atoms and Ions (joint session A/Q)

Q 64.7: Poster

Donnerstag, 13. März 2025, 17:00–19:00, Tent

Spectroscopy on the 657nm and 456nm calcium clock transitions in a heat pipe — •Andreas Reuss, David Röser, Frederick Wenger, Hans Kessler, and Simon Stellmer — Physikalisches Institut, Universität Bonn

Alkaline-earth metals have become the system of choice in atomic clocks and quantum computing devices. Among these elements, calcium appeals to both the atomic physics community, owing to the availability of suitable clock transitions, as well as to the nuclear physics community, as the calcium nucleus is particularly *hard* and isotopes disperse around two nuclear shell closures.

Two clock transitions, very different in character, are available: the spin-forbidden 657-nm intercombination line and the 458-nm quadrupole transition.

We are preparing for co-located, simultaneous spectroscopy of these two transitions using a Ramsey-Bordé scheme on a beam of atoms. For preparation, we have performed spectroscopy of these transition in a heat pipe and will report on these studies.

Keywords: Calcium; Ramsey-Bordé; Spectroscopy; Clocktransitions