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Journal Article

Rydberg atom-ion collisions in cold environments


Pérez-Ríos,  Jesús
Molecular Physics, Fritz Haber Institute, Max Planck Society;
Institute for Molecules and Materials, Radboud University;

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Hirzler, H., & Pérez-Ríos, J. (2021). Rydberg atom-ion collisions in cold environments. Physical Review A, 103(04): 043323. doi:10.1103/PhysRevA.103.043323.

Cite as: https://hdl.handle.net/21.11116/0000-0008-5533-F
Low-energy collisions of Rydberg atom-ion systems are investigated theoretically. We present the parameter space associated with suitable approaches for the dynamics of Rydberg atom-ion collisions, i.e., quantum, Langevin, and classical exchange regimes, showing that for the lowest reachable temperatures a classical treatment is appropriate. A quasiclassical trajectory method is used to study charge exchange cross sections for Li∗−Li+ and Li∗−Cs+ at collision energies down to 1K. For cold collisions we find the charge exchange cross section deviating from the n4 geometric scaling. Furthermore, for low-energy collisions, we find both an influence of the ionic core repulsion as well as variations for two different models used for describing the electron-core potential.