Erlangen 2018 – scientific programme
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A: Fachverband Atomphysik
A 16: Atomic Clusters I (joint session A/MO)
A 16.2: Talk
Monday, March 5, 2018, 16:45–17:00, K 2.016
Rotating rotationless: nonadiabatic alignment of the helium dimer — •Maksim Kunitski1, Qingze Guan2, Stefan Zeller1, Dörte Blume2, and Reinhard Dörner1 — 1Institut für Kernphysik, Goethe-Universität Frankfurt am Main — 2Department of Physics and Astronomy, University of Oklahoma
Quantum mechanically rotational and vibrational dynamics in molecules is time evolution of corresponding wave packets. Such dynamics can be periodic, as well-known rotational and vibrational revivals with wave packets consisting of many coherently prepared bound states. How the rotational and vibrational dynamics would look like in a molecular system with a single bound state? One of such extreme quantum system is the helium dimer, where the two-body potential supports only one state.
We applied the nonadiabatic "kick" to the helium dimer by a femtosecond laser pulse (pump) and watched evolution of the system by Coulomb explosion imaging, which was initiated by the second much more intense delayed probe pulse. The observed time-dependent alignment of the helium dimer, as well as time evolution of the rovibronic wave packet, is going to be discussed.