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Erlangen 2018 – scientific programme

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MO: Fachverband Molekülphysik

MO 22: Posters 3: Experimental and Theoretical Techniques and High Resolution Spectroscopy

MO 22.16: Poster

Thursday, March 8, 2018, 16:15–18:15, Zelt West

Coupling of the 2 2 Σ + and 1 2 Π of LiSr — •Erik Schwanke, Julia Gerschmann, Horst Knöckel, Silke Ospelkaus, and Eberhard Tiemann — QUEST und Inst. f. Quantenopik, Leibniz Universität Hannover

Building on our spectroscopic study of the 2 2 Σ + – 1 2 Σ + system of LiSr, we modeled perturbations in the thermal emission spectrum as coupling between the F1 and F2 levels of the 2 2 Σ + state and the 1 2 Π1/2 and 1 2 Π3/2 states. The rotational and vibrational constants of the 2 2 Σ + state were derived from the thermal emission spectrum and laser-induced fluorescence in the near infrared.

Several large perturbations of the rotational ladders of v = 0 and v = 1 allow to estimate the rotational and vibrational constants of the 2 Π state, while accompanying smaller perturbations hint at its spin-orbit coupling constant. A preliminary deperturbation of one of the larger instances led to more refined values for the rotational and vibrational constants of 12 Π, as well as a first estimate the coupling strength and the spin-rotation coupling in 2 2 Σ +. Adding further perturbed states, a more global picture of the coupling constants and the 12 Π state will be derived.

We will report on the status of the investigations.

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