SAMOP 2023 – wissenschaftliches Programm
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SYHD: Symposium Molecules in Helium Droplets
SYHD 1: Molecules in Helium Droplets
SYHD 1.1: Hauptvortrag
Mittwoch, 8. März 2023, 11:00–11:30, E415
Structure and field-induced dynamics of small helium clusters — •Maksim Kunitski1, Jan Kruse1, Qingze Guan2, Dörte Blume2, and Reinhard Dörner1 — 1Institut für Kernphysik, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 1, 60438 Frankfurt am Main, Germany — 2Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 W. Brooks St., Norman, OK 73019, USA
Small helium clusters are peculiar few body quantum systems. The helium dimer has a single weakly bound state of a huge spatial extent. About 80% of its probability distribution resides in the classically forbidden tunnelling region. This is why such objects are termed “quantum halos”. The helium trimer has two bound states, one of which is of Efimov nature. We utilize laser-triggered Coulomb explosion imaging for measuring spatial probability distributions of these quantum objects. Application of an additional laser pulse in a pump-probe manner allows us to observe the structural response dynamics of small helium clusters to a strong laser field on a picosecond time scale.
The results of our experimental approach on He2, He3 and He4 will be discussed.