Hannover 2013 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 27: Poster 3: Collisions, Electronic Spectroscopy, Energy Transfer, Quantum Chemistry, Molecular Dynamics, Photochemistry, Spectroscopy in He-Droplets
MO 27.11: Poster
Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof
Vibrational state effects in ion-molecule reactions — •Martin Stei1, Eduardo Carrascosa1, Josef Wildauer1, Sebastian Trippel2, Aditya Kelkar1, Torsten Best1, and Roland Wester1 — 1Institut f. Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria — 2Center for Free Electron Lasers, DESY, Hamburg, Germany
In our group a crossed-beam velocity map imaging setup (VMI) has been developed to study ion-molecule reactions [1,2]. With an improved crossed beam 3D-VMI setup we have measured vibrational state-to-state differential cross-sections of the charge-transfer reaction Ar+ + N2 → Ar + N2+ with significantly increased resolution. We find qualitative agreement with the theoretical predictions of Candori et al. [3]. We will also present our progress towards selectively exciting rovibrational states with a narrowband infrared laser to study the influence of vibrational (spectator) modes. In order to separate the initial rotational states before the vibrational excitation we have implemented a Stark deflector based on the design of Filsinger et al. [4]
J. Mikosch et al., Science 319, 183 (2008)
[2] R. Otto et al., Nature Chemistry 4, 534 (2012)
[3] R. Candori et al., J. Chem. Phys. 115, 8888 (2001)
[4] F. Filsinger et al., J. Chem. Phys. 131, 064309 (2009)