Quantitative Analysis of Selected Elementary Reactions in Plasma Chemistry
Abstract
This report describes results of the ongoing collaboration between the group of Dr. A. A. Viggiano at Albuquerque and the groups of Dr. G.Marowsky and Dr. J. Troe at Goettingen. This collaboration has started in 2004, has been documented in close to 40 publications, and continues to be productive. The present project concerned central aspects of plasma-chemical processes such as they are of importance for an understanding of ionospheric phenomena, plasma-processing of materials, and high-energy environments with plasma participation. In detail, the present activity focused on two fundamental processes in plasma-chemical kinetics, (i) the interaction of electrons with neutral target molecules and the chemical dynamics of the resulting molecular ions, (ii) reactions of ions, in particular transition metal atom and transition metal oxide cations, with neutral molecules. Experimental results were obtained at Albuquerque, theoretical techniques were elaborated mostly at Goettingen , but then standardized for broader applications at Albuquerque. The extension of earlier models for electron attachment to neutral target molecules now approaches a quantitative level, such as demonstrated for the key system in this field, i.e. the electron attachment to SF6. This process has been investigated with improved experimental techniques at Albuquerque. The chemical dynamics of the formed SF6- anions, characterized by a competition between reemission of electrons and fragmentation of the anions to SF5- F, then has been analyzed at Goettingen in terms of statistical rate models and electron autodetachment theories A level was chosen which was only as complicated as necessary and which is useful for practical applications. Likewise, ion-molecule reactions involving complicated internal chemical rearrangements were analyzed with respect to the rate-determining steps and then described by statistical rate theories.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 22, 2020
- Accession Number
- AD1108975
Entities
People
- Hans Jurgen Troe