Düsseldorf 2007 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 22: Cold Molecules I (gemeinsam mit Q)

MO 22.1: Hauptvortrag

Dienstag, 20. März 2007, 10:30–11:00, 6B

Ultracold Molecular Ions in Radiofrequency Traps - Production and Spectroscopy — •Bernhard Roth, Jeroen Koelemeij, Chaobo Zhang, David Offenberg, Andreas Wicht, Ingo Ernsting, and Stephan Schiller — Institut für Experimentalphysik, Universitätsstr. 1, D-40225 Düsseldorf

A general method for the production of translationally cold charged molecules is sympathetic cooling by laser-cooled atomic ions. Recently, we have shown that using two coolant species only (beryllium and barium ions) molecular ions with masses from 2 to 470 amu can be cooled to temperatures of 10-100 mK. The wide range of coolable species makes the method attractive for many studies in chemical physics, molecular physics, fundamental physics, and astrochemistry. Since the molecular ions can be trapped for times exceeding minutes in a near-collision-less environment, light-molecule and molecule-molecule interactions in a new regime can be studied. Examples are precise spectroscopy, molecular quantum state preparation, internal coherence, interactions with neutral particles, spontaneous emission. In this talk we will describe preparation methods, spectroscopy results and outline future developments.