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Reaktionskinetik der Ozonbildung in der Sauerstoffglimmentladung
Author(s) -
Sabadil H.,
Bachmann P.,
Kastelewicz H.
Publication year - 1980
Publication title -
beiträge aus der plasmaphysik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0005-8025
DOI - 10.1002/ctpp.19800200405
Subject(s) - electron density , torr , atomic physics , analytical chemistry (journal) , kinetic energy , current density , chemistry , ozone , electron , oxygen , absorption (acoustics) , physics , materials science , thermodynamics , optics , quantum mechanics , meteorology , chromatography
Abstract Hg‐light absorption at λ = 2537 Ǎ by O 3 has been used to measure the concentration of O 3 in the positive column of an oxygen glow discharge under the nonstationary conditions of the Q‐form (tube diameter 3:4 cm). For all gas pressures investigated ( p = 7 — 12 torr) the O 3 density ( n 3 ) as a function of the current reaches a remarkable maximum at i ≈ 15 mA. n 3 max was found to increase almost linearly with the gas pressure. A t i = 80 mA, on the other hand, n 3 increases according to a quadratic relation. In order to understand the dependence of n 3 on the pressure and on the current density (or equivalently on the electron density n e ) a kinetic model previously developed has been used involving the following particles. For example, it can be shown that in the region of the maximum of n 3 one main production process of ozone is the associative detachment reaction. The calculated maximum of the ozone density is higher than the measured one and appears at higher electron density.