Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 14: Posters 3: Novelties in Molecular Physics: Theory of Molecular Dynamics, Collisions and Energy Transfer, and Experimental Techniques
MO 14.1: Poster
Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof
Quantum dynamics and electronic effects in ion-molecule interactions in cold traps — •Ibrokhim Iskandarov, Fabio Carelli, Francesco Gianturco, and Roland Wester — Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Austria
Until a few years ago, studies of cold reactive processes in hybrid-traps have been restricted to atomic ions and neutral atoms. The ion-neutral hybrid-trapping technique has been recently extended to also probe cold reactive collisions of sympathetically cooled molecular ions by their interaction with laser cooled atomic ions [1]. By choosing N2+ molecules and Rb atoms as a system, they can reveal very important features about the interaction forces between molecular ions and atoms.
Inelastic collisions with neutral buffer gas have been shown to represent an effective way to cool the internal molecular degrees of freedom and going beyond the translational cooling [2]. This approach rests on the fact that in the framework of the neutral buffer gas cooling scheme, the rotational molecular temperature can be tuned to a value lower than the translational one. We are currently computationally probing this effect in case of interaction of MgH+ with He as a buffer gas.
[1] F. Hall and S. Willitsch, Phys. Rev. Lett. 109, 233202 (2012).
[2] P.F. Staanum, K. Hojbjerre, P.S. Skyt, A.K. Hansen, M. Drewsen, Nature Physics 6, 271 (2010).