Accession Number : AD0714237

Title :   Mobilities and Longitudinal Diffusion Coefficients of Mass-Identied Potassium Ions and Positive and Negative Oxygen Ions in Oxygen.

Descriptive Note : Technical rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS

Personal Author(s) : Snuggs,R. M. ; Volz,D. J. ; Schummers,J. H. ; Martin,D. W. ; McDaniel,E. W.

Report Date : SEP 1970

Pagination or Media Count : 35

Abstract : Measurements at room temperature of the mobility and longitudinal diffusion coefficient have been made for low energy mass-identified potassium ions and positive and negative oxygen ions in oxygen gas in a drift tube mass spectrometer. The zero-field reduced mobilities of K(+) and O2(+) were found to be 2.68 plus or minus 0.11 and 2.24 plus or minus 0.09 sq cm/V sec, respectively. O(-), O2(-), and O3(-) were determined to have zero-field reduced mobilities. The zero-field reduced mobility of O4(+) was determined to be close to that of O2(+) and the mobility of O4(-) was shown to be similar to that for O2(-). The longitudinal diffusion coefficients were measured for O2(+), K(+), O(-), and O2(-) in O2. The longitudinal diffusion coefficients of all investigated ionic species at low E/N were at least within 16 per cent of the values predicted from the mobilities by the Einstein Relation. At higher E/N the coefficients increased, in some cases quite rapidly, as E/N was increased. (Author)

Descriptors :   (*OXYGEN, DRIFT), (*MASS SPECTROSCOPY, SPECTRUM ANALYZERS), DIFFUSION, IONS, POTASSIUM, MOBILITY

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE