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Electron scattering and dielectronic recombination with an ion in thepresence of a neighboring atom is studied. The incident electron is assumed tobe captured by the ion, leading to resonant excitation of the atom whichafterwards may stabilize either by electron re-emission or radiative decay. Weshow that the participation of the atom can strongly affect, bothquantitatively and qualitatively, the corresponding processes of electronscattering and recombination. Various ion-atom systems and electronictransitions are considered. In particular we show that electron scatteringunder backward angles may be strongly enhanced and derive the scaling behaviorof two-center dielectronic recombination with the principal quantum numbers ofthe participating atomic states.

Resonant electron scattering and dielectronic recombination in two-center atomic systems