The off-resonant dielectronic recombination in a collision of an electron with a heavy hydrogen-like ion

TL;DR

This paper investigates off-resonant dielectronic recombination in electron-heavy ion collisions, analyzing electron-electron interactions and their effects across resonance and non-resonance regions.

Contribution

It provides a rigorous first-order treatment of electron-electron interactions and explores the off-resonant dielectronic recombination mechanism in detail.

Findings

Electron-electron interaction effects are significant beyond resonance conditions.

The dielectronic-recombination contribution extends into off-resonance regions.

Theoretical framework improves understanding of recombination processes in heavy ions.

Abstract

The recombination of an electron with an (initially) hydrogen-like ion is investigated. The effect of the electron-electron interaction is treated rigorously to the first order in the parameter 1/Z and within the screening-potential approximation to higher orders in 1/Z, with Z being the nuclear charge number. The two-electron correction contains the dielectronic-recombination part, which contributes to the process not only under the resonance condition for the projectile energy but also in the regions far from resonances. The mechanism of the off-resonant dielectronic recombination is studied in detail.