Accession Number : AD0723642

Title :   Theoretical Study of Electron Attachment Phenomena.

Descriptive Note : Final rept. 15 Dec 69-15 Dec 70,

Corporate Author : MCDONNELL DOUGLAS ASTRONAUTICS CO-EAST ST LOUIS MO

Personal Author(s) : Cowperthwaite,Ronald L. ; Myers,Howard

Report Date : 15 FEB 1971

Pagination or Media Count : 89

Abstract : The report presents the results of a theoretical investigation of the attachment of electrons to molecules with the formation of negative ions. Two major areas were studied: The mechanism of electron attachment, and Neutral atom stripping reactions. A phenomenological model of the attachment cross section was developed and employed to establish criteria for the use of attaching compounds to reduce boundary layer plasmas. In order to check the attachment model with experimental data, a convolution analysis of electron impact experiments was formulated. The analysis of beam energy resolution led to a study of energy dispersion in cross beam experiments and to the conceptual design of a negative iodine ion beam experiment. The potential degradation in the efficiency of electron attachment due to the reactivity of atomic oxygen was assessed through the formulation of a reaction cross section model for atom stripping. (Author)

Descriptors :   (*DIATOMIC MOLECULES, *ELECTRON CAPTURE), THEORY, MATHEMATICAL ANALYSIS, DISSOCIATION

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE