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arXiv · 1905.02105

Two-center dielectronic recombination in slow atomic collisions

A. Jacob·C. Müller·A. B. Voitkiv
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Abstract

A free electron can form a bound state with an atomic center $A$ upon photo emission (radiative recombination). In the presence of a neighboring atom $B$, such a bound state can, under certain conditions, be also formed via resonant transfer of energy to $B$, with its subsequent relaxation through radiative decay (two-center dielectronic recombination). This two-center process is very efficient in the 'static' case where $A$ and $B$ form a weakly bound system, dominating over single-center radiative recombination up to internuclear distances as large as several nanometers. Here we study its dynamic variant in which recombination occurs when a beam of species $A$ collides with a gas of atoms $B$ and show that, even though the average distance between $A$ and $B$ in collisions is orders of magnitude larger than the typical size of a bound system, the two-center recombination can still outperform the single-center radiative recombination.

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A. Jacob, C. Müller, A. B. Voitkiv. 2019-05-06. Two-center dielectronic recombination in slow atomic collisions. https://doi.org/10.1103/physreva.100.012706

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