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MO: Fachverband Molekülphysik

MO 8: Poster: Electronic Spectroscopy

MO 8.3: Poster

Dienstag, 9. März 2010, 16:00–18:30, Lichthof

Stark effect measurements on the NaK molecule — •Andreas Gerdes, Horst Knöckel, and Eberhard Tiemann — Welfengarten 1, 30167 Hannover

Polar alkali molecules are presently highly studied particles for ultracold ensembles in which the anisotropic long range dipole-dipole interaction are investigated. We took NaK as an example and measured lines of three vibrational bands B  ¹Π   ← X  ¹Σ⁺   in an electric field for deriving the dipole moment.

The observed Stark splitting is composed out of the linear contribution of the excited state B state and the second order effects from both B and X states.

A quantum chemistry approach using effective core potentials predicts a dependency on the vibrational quantum number from the dipole moment functions of ground and excited state.

Our measurements allow for a comparison which shows a fairly good agreement with the calculations for the excited state, which characterizes the quality of the calculation.