Back to Search Start Over

Electron-Impact Excitation and Dissociation of Heavy Rare Gas Heteronuclear Ions via Transitions to Charge Transfer States

Authors :
Alexander Narits
Konstantin Kislov
Vladimir Lebedev
Source :
Atoms, Vol 11, Iss 3, p 60 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

Heteronuclear diatomic rare gas molecular cations feature excited electronic terms with charge transfer character located several eV above the ground term. The role of such terms in collisions involving heteronuclear ions is studied theoretically under conditions typical of the plasma-based sources of UV and IR radiation. Calculations were carried out for processes of dissociative excitation, dissociative recombination and electron impact bound–bound excitation in Ar/Xe and Kr/Xe plasmas using the recently developed semiclassical approach combined with the ab initio data for potential energy curves and oscillator strengths of electronic transitions. The approach consistently describes the contributions from the entire rovibrational manifold to the processes studied. The cross sections of the processes mentioned are calculated for wide ranges of gas temperatures and electron energies. We show that the processes considered are quite effective when they are accompanied by transitions to charge transfer terms. For the range of electron energies typical of active media of UV and IR radiation sources the cross sections exceed those reported for the processes usually considered to involve transitions between the ground and first excited electronic state. The excitation of charge transfer electronic terms can play an important role in the kinetics of rare gas mixture plasmas.

Details

Language :
English
ISSN :
22182004
Volume :
11
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Atoms
Publication Type :
Academic Journal
Accession number :
edsdoj.63638f2a56d0483295f18ed870986a84
Document Type :
article
Full Text :
https://doi.org/10.3390/atoms11030060