Mechanism of dissociative excitation processes in collisions of He+ ions with N2, O2 molecules, O2 collisions

Author: Malkhaz Gochitashvili
Co-authors: Ramaz Lomsadze, Roman Kezerashvili
Keywords: Dissociation, excitation, vacancy
Annotation:

The excitation functions of the dissociation products were measured both in the visible 400-800 nm and in the vacuum ultraviolet region 50-130 nm. For the He+ - N2 pair, the results related to the linear polarization of the dissociation product radiation are presented. Measurements were made in the ion energy range of 0.5 keV-10 keV. It is shown that the excitation of dissociation products for He+ ions is realized in the charge- exchange process. The mechanism of excitation is related to the formation of a highly excited intermediate molecular state during the charge-exchange process, namely, the creation of a vacancy on the inner shell of the molecule. The vacancy formation mechanism is uniquely related to the ion-molecule symmetry of the three-particle system, and the experimental results are qualitatively explained within the quasi-diatomic approximation.

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The mechanism of dissociative excitation processes in collisions of He+ ions with N2, and O2 molecules [en]