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Long-range versus short-range effects in cold molecular ion-neutral collisions.

  • Dörfler AD Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland.
  • Eberle P Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland.
  • Koner D Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland.
  • Tomza M Faculty of Physics, University of Warsaw, Pasteura 5, 02-093, Warsaw, Poland. michal.tomza@fuw.edu.pl.
  • Meuwly M Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland. m.meuwly@unibas.ch.
  • Willitsch S Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland. stefan.willitsch@unibas.ch.
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  • 2019-11-30
Published in:
  • Nature communications. - 2019
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy
General Chemistry
English The investigation of cold interactions between ions and neutrals has recently emerged as a new scientific frontier at the interface of physics and chemistry. Here, we report a study of charge-transfer (CT) collisions of Rb atoms with N[Formula: see text] and O[Formula: see text] ions in the mK regime using a dynamic ion-neutral hybrid trapping experiment. We observe markedly different CT kinetics and dynamics for the different systems and reaction channels studied. While the kinetics in some channels are consistent with classical capture theory, others show distinct non-universal dynamics. The experimental results are interpreted with the help of classical-capture, quasiclassical-trajectory and quantum-scattering calculations using ab-initio potentials for the highly excited molecular states involved. The theoretical analysis reveals an intricate interplay between short- and long-range effects in the different reaction channels which ultimately determines the CT dynamics and rates. Our results illustrate salient mechanisms that determine the efficiency of cold molecular CT reactions.
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  • English
Open access status
gold
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https://sonar.ch/global/documents/123911
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