STUDIES AND EXPERIMENTAL WORK ON ATOMIC COLLISION PROCESSES OCCURRING IN ATMOSPHERIC GASES.
Research rept. 22 Dec 65-1 Sep 66,
WESTINGHOUSE RESEARCH LABS PITTSBURGH PA
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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 cmsec. A significant temperature dependence for alpha O2 has been observed, the values ranging from approximately 3.6 x 0.0000001 cu cmsec at 200 K to 1.8 x 0.0000001 cu cmsec 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 cmsec. In particular, a preliminary value of 4 x 10 to the minus 10th power cu cmsec. 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
- Atmospheric Physics
- Atomic and Molecular Physics and Spectroscopy