Accession Number : AD0616103

Title :   THEORETICAL STUDIES OF HEAVY ION EXCHANGE IN AIR.

Descriptive Note : Final rept. for 17 Jun 63-30 Jun 64,

Corporate Author : GEOPHYSICS CORP OF AMERICA BEDFORD MASS

Personal Author(s) : Victor,G. A. ; Webb,T. G.

Report Date : APR 1965

Pagination or Media Count : 191

Abstract : The results are presented of a search for charge exchange reactions possessing small energy defects (for which the Massey adiabatic theory predicts a large cross section) between typical metallic ions and neutral atomic and molecular atmospheric constituents. The BrinkmanKramers (BK) approximation has been applied to calculate the differential and total cross sections (for velocities between 0.1 and 75 au) of the reaction Al(+)(3s(2) (1)S) plus A(3p(b) (1)S) yields Al(3p (2)P) plus A(+)(3p (5) (2)p). These are compared with available experimental data. In appendix I it is estimated that the cross sections for radiative charge exchange processes are negligible by comparison with those for the radiationless processes except at the lowest velocities of interest. Appendix II contains the results of this survey and a discussion of the validity of semi-empirical curve fitting and scaling of the data. A brief review of the available theoretical descriptions of inelastic heavy particle rearrangement collision processes is presented in appendix III. The detailed formulation for the above reaction is presented in appendix IV; the formulations for several other reactions have been completed and are also indicated. (Author)

Descriptors :   (*ION EXCHANGE, AIR), (*AIR, ION EXCHANGE), EXCHANGE REACTIONS, THEORY, ATMOSPHERES, GASES, ARGON, NITROGEN, OXYGEN, ATOMS, NUCLEAR CROSS SECTIONS, ALUMINUM, METALS, IONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE