Electron-impact direct double ionization

2013/11/28 by V. Jonauskas, A. Prancikevičius, Jonauskas, V. +5
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #physics.atom-ph

paper · pdf · doi:10.48550/arxiv.1311.7415

arxiv created 2013/11/28 · arxiv updated 2013/12/02

Abstract

Electron-impact direct double ionization (DDI) process is studied as a sequence of two and three step processes. Contribution from ionization-ionization, ionization-excitation-ionization, and excitation-ionization-ionization processes is taken into account. The present results help to resolve the long-standing discrepancies; in particular, a good agreement with experimental measurements is obtained for double ionization cross-sections of O¹⁺, O²⁺, O³⁺, C¹⁺, and Ar²⁺ ions. We show that distribution of the energy of scattered and ejected electrons, which participate in the next step of ionization, strongly affects DDI cross-sections.

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