Mainz 2017 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 12: Posters 2: Molecular Dynamics, Clusters, and High Resolution Spectroscopy

MO 12.3: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG1

A Velocity Map Imaging setup to benchmark technologies enabling the study of new systems on ion-molecule reactions — •Patrick Strübin, Franziska Krammer, Tim Michaelsen, Jennifer Meyer, Atilay Ayasli, Björn Bastian, and Roland Wester — Institut für Ionen und Angewandte Physik, Universität Innsbruck, Austria

Our group studies the dynamics of ion-molecule reactions by crossed-beam Velocity Map Imaging (VMI) [1]. For neutral reactions there have been a lot of investigations on the influence of excited vibrational states prior to the reaction [2]. We are planning to extend this research to ion-molecule reactions. As a first step a new crossed-beam VMI setup has been built. It will be used for measurements to determine the fraction of molecular excitation in the neutral molecular beam by a tunable optical parametric oscillator laser.

Furthermore we will extend our research to metal ion reactions with hydrocarbons. To produce metal ions we will use a laser vaporisation source [3,4] attached to the VMI spectrometer. Here we present test measurements and design considerations for the new VMI spectrometer, the metal ion source and the laser excitation scheme.

[1] R. Wester, Phys. Chem. Chem. Phys. 16, 396 (2014)

[2] K. Liu, J. Chem. Phys. 142, 080901 (2015)

[3] T. G. Dietz et al., J. Chem. Phys. 74, 6511 (1981)

[4] D. Proch and T. Trickl, Rev. Sci. Instrum. 60, 713 (1989)