Hamburg 2009 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 13: Molekülphysik Poster 1
MO 13.47: Poster
Dienstag, 3. März 2009, 16:30–19:00, VMP 8 Foyer
Towards Improved Rovibrational Spectroscopy of Cold Trapped HD+ Ions — •Tobias Schneider, Bernhard Roth, Ulf Bressel, Ingo Ernsting, Michael Hansen, Hannes Duncker, Sergey Vasilyev, Alexander Nevsky, and Stephan Schiller — Institut für Experimentalphysik, Heinrich-Heine Universität Düsseldorf, 40225 Düsseldorf
HD+ ions, the simplest heteronuclear molecules in nature, are interesting systems for precision spectroscopy because of the availability of precise theoretical ab-initio calculations [1]. Promising applications are, for example, improved tests of QED effects in molecules and the possibility to determine the electron-to-proton mass ratio me/mp.
We describe work towards improved measurements of rovibrational transition frequencies in cold, trapped HD+ ions, aiming to reach an at least tenfold improvement over our previous measurements [2]. We present recent modifications to our apparatus and measurement procedures, that will ultimately allow (i) deterministic preparation of the HD+ ions in their rovibrational ground state, (ii) precise determination of the hyperfine hamiltonian and the Zeeman effect using THz rotational spectroscopy, and (iii) Doppler-free spectroscopy.
[1] V.I. Korobov, Phys. Rev. A 74, 052506 (2006)
[2] J. Koelemeij et al., Phys. Rev. Lett. 98, 173002 (2007)