Ratio of Diffusion Coefficient to Mobility for Electrons in SF6-Air and Freon-Nitrogen Mixtures

Autor:	V. N. Maller, M. S. Naidu
Rok vydání:	1975
Předmět:	Nuclear and High Energy Physics Electron mobility Range (particle radiation) Freon Materials science Diffusion Analytical chemistry chemistry.chemical_element Electron Condensed Matter Physics Nitrogen Sulfur hexafluoride chemistry.chemical_compound chemistry Ionization Atomic physics
Zdroj:	IEEE Transactions on Plasma Science. 3:205-208
ISSN:	1939-9375 0093-3813
DOI:	10.1109/tps.1975.4316908
Popis:	The ratio of diffusion coefficient to mobility (D/?) for electrons has been measured in SF6-air and freon-nitrogen mixtures for various concentrations of SF6 and freon in the mixtures over the range 140? E/p? 220 V.cm-1 - torr-1. In SF6-air mixtures, the values of D/? were always observed to lie intermediate between the values for the pure gases. However, in freon-nitrogen mixtures, with a small concentration (10 percent) of freon in the mixture, the values of D/? are found to lie above the boundaries determined by the pure gases. In this mixture, over the lower E/p range (140 to 190) the electrons appear to lose a large fraction of their energy by the excitation of the complex freon molecules, while at higher E/p values (200 to 240), the excitation and consequent deexcitation of nitrogen molecules and its metastables seem to cause an increased rate of ionization of freon molecules.
Databáze:	OpenAIRE
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