Low-Field Mobilities of the Negative Ions in Oxygen, Sulfur Hexafluoride, Sulfur Dioxide, and Hydrogen Chloride

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Abstract
Measurements of the low-field mobility of the negative ions in O2, SF6, SO2, and HCl are described. The results are 2.46, 0.57, 0.35, and 0.71 cm2/v-sec, respectively, reduced to 0°C and 760 mm Hg pressure. A quantum-mechanical theory of ionic mobility is outlined and applied to the gases investigated experimentally. Comparison of the experimental and theoretical results indicates that the oxygen ion is O3−, but attempts to identify the ions in the other gases are inconclusive.

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