Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 23: Collisions, scattering and correlation phenomena

A 23.2: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik

Scaling behavior of dielectronic recombination in two-center atomic systems — •Andreas Jacob, Alexander B. Voitkiv, and Carsten Müller — Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf

Dielectronic recombination with an ion in the presence of a neighboring atom is examined by theoretical means. The incident electron is assumed to be captured by the ion, leading to resonant excitation of the atom which afterwards stabilizes by radiative decay. The scaling behavior of this two-center dielectronic recombination with the principal quantum numbers of the participating atomic states is derived, this way extending earlier studies of the process. We show that the participation of the atom can lead to a strong resonant enhancement of electron-ion recombination for internuclear distances up to few nanometers. The enhancement is found to be so enormous that the two-center process can compete with ordinary single-center recombination even after integrating over a rather broad distribution of incident electron energies.
[1] A. Eckey, A. Jacob, A. B. Voitkiv and C. Müller, Phys. Rev. A 98, 012710 (2018)