Siegel der Universität

Universität zu Köln
Mathematisch-Naturwissenschaftliche Fakultät
Fachgruppe Physik

I. Physikalisches Institut

Cold molecular ions

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The objective of this project is the determination of IR and FIR spectra of molecular ions as well as the quantitative understanding of the dynamics of ion molecule reactions at temperatures relevant to the interstellar medium. In a 22-pole ion trap apparatus the rather specific and ultra-sensitive method of laser induced reactions (LIR) is applied to obtain spectra for small hydrocarbon ions as well as for the astrophysically relevant H2D+. Recent developments in our laboratory aim at the possibility to obtain also spectra of the rather elusive polycyclic aromatic hydrocarbon (PAH) molecules, which are thought to be one of the most important carbon carriers.

Contact: Prof. Dr. Stephan Schlemmer