SAMOP 2023 – scientific programme

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MO: Fachverband Molekülphysik

MO 20: Poster III

MO 20.5: Poster

Thursday, March 9, 2023, 16:30–19:00, Empore Lichthof

Spectroscopy of the (2)¹Σ_u state in Rb2 — •Dominik Dorer¹, Shinsuke Haze¹, Markus Deiß¹, Eberhard Tiemann², and Johannes Hecker Denschlag¹ — ¹Institut für Quantenmaterie, Universität Ulm — ²Institut für Quantenoptik, Leipniz Universität Hannover

We report a systematic study of the (2)¹Σ_u electronic state of the rubidium dimer. For this we carried out single-photon photoassociation spectroscopy with an ultracold sample of ground state atoms. Using either a pulsed or a more narrow cw laser we investigated the vibrational and rotational structure for both isotopologues, ⁸⁷Rb and ⁸⁵Rb. From a theoretical analysis including also previously recorded data from other experiments, we got new insights of spin-orbit and rotational interactions for the (2)¹Σ_u state. These results are also of interest for state-selective molecule detection schemes on the basis of resonance-enhanced multiphoton ionization (REMPI) as the (2)¹Σ_u can serve as an appropriate intermediate state.