Accession Number : AD0654657

Title :   STUDIES AND EXPERIMENTAL WORK ON ATOMIC COLLISION PROCESSES OCCURRING IN ATMOSPHERIC GASES.

Descriptive Note : Research rept. 22 Dec 65-1 Sep 66,

Corporate Author : WESTINGHOUSE RESEARCH LABS PITTSBURGH PA

Personal Author(s) : Phelps,A. V. ; Kasner,W. H.

Report Date : JUN 1967

Pagination or Media Count : 52

Abstract : Microwave and mass spectrometric techniques have been used to study electron-ion recombination in the afterglow of 'single pulse' microwave discharges under conditions where O2(+) is the only significant afterglow ion species. At room temperature (approximately equals 300 K) the measured recombination coefficient, alpha (O2(+)), has a value of (2.2 plus or minus 0.4) x 0.0000001 cu cm/sec. A significant temperature dependence for alpha (O2(+)) has been observed, the values ranging from approximately 3.6 x 0.0000001 cu cm/sec at 200 K to 1.8 x 0.0000001 cu cm/sec at 550 K. Several associative detachment reactions involving the negative ion O(-) have been studied. The measured reaction rates are all in excess of 10 to the minus 10th power cu cm/sec. In particular, a preliminary value of 4 x 10 to the minus 10th power cu cm/sec. has been obtained for the O(-) + O associative detachment reaction. The apparent destruction of O2(-) by O has also been observed, but no reliable quantitative results are available at this time. The energy dependence of some of these reactions have been studied over the range 0.042 to 0.10 eV. (Author)

Descriptors :   (*ATMOSPHERES, *GASES), (*MASS SPECTROSCOPY, GASES), ELECTRON DENSITY, SPECTROMETERS, RECOMBINATION REACTIONS, OXYGEN, MOLECULES, ARGON, TEMPERATURE, IONS, PRESSURE, THEORY, ELECTRONS, NITROGEN COMPOUNDS, ENERGY, OXIDES, MEASUREMENT

Subject Categories : Atmospheric Physics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE