Erlangen 2018 – scientific programme
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MO: Fachverband Molekülphysik
MO 22: Posters 3: Experimental and Theoretical Techniques and High Resolution Spectroscopy
MO 22.18: Poster
Thursday, March 8, 2018, 16:15–18:15, Zelt West
Absorption spectroscopy on KCa — •Julia Gerschmann1, Erik Schwanke1, Horst Knöckel1, Silke Ospelkaus1, Asen Pashov2, and Eberhard Tiemann1 — 1QUEST und Inst. f. Quantenopik, Leibniz Universität Hannover — 2Sofia Universität "St. Kliment Ohridski", Bulgarien
The combination of an alkaline and an alkaline earth atom leads to molecules with permanent electric and magnetic dipole moments and thus offer manipulation of their states by external fields. Several ab initio calculations have been published on various combinations of a group IA and a group IIA atom. Experimentally, not so much is known about the molecular electronic states.
In the past we were able to describe potential energy curves for the first two 2Σ + states via high resolution Fourier transform spectroscopy. We have used laser induced fluorescence to assign the quantum numbers up to N = 179 of transitions from v′≤ 7 to v″≤ 10. The rovibrational spectrum can be described by fitted potential energy curves and the spin-rotation coupling.
Currently, based on ab initio calculations, we set up a laser absorption experiment in the visible region around 17000 cm−1 to address higher 2Σ + and 2Π states from the known ground state. There we expect low density of K2 lines. Lines thus identified as belonging to KCa can then be used for further laser induced fluorescence experiments.
We will report on the status of the investigations.