{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,1]],"date-time":"2026-03-01T01:10:15Z","timestamp":1772327415435,"version":"3.50.1"},"reference-count":50,"publisher":"IOP Publishing","issue":"19","license":[{"start":{"date-parts":[[2012,4,25]],"date-time":"2012-04-25T00:00:00Z","timestamp":1335312000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/page\/copyright"},{"start":{"date-parts":[[2012,4,25]],"date-time":"2012-04-25T00:00:00Z","timestamp":1335312000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["J. Phys. D: Appl. Phys."],"published-print":{"date-parts":[[2012,5,16]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>A self-consistent model is developed in order to investigate the dissociation of O<jats:sub>2<\/jats:sub> molecules in Ar\u2013O<jats:sub>2<\/jats:sub> surface-wave microwave discharges. The dissociation degree of O<jats:sub>2<\/jats:sub> molecules ([O]\/2[O<jats:sub>2<\/jats:sub>]<jats:sub>0<\/jats:sub>) is determined for surface-wave discharges generated in 0.5\u00a0cm and 2.8\u00a0cm diameter tubes with 2.45\u00a0GHz and 915\u00a0MHz microwave field frequencies, respectively, in the 0.5\u201325\u00a0mbar pressure range at different mixture compositions from pure O<jats:sub>2<\/jats:sub> to 95%Ar\u20135%O<jats:sub>2<\/jats:sub>. The dissociation degree varies non-monotonically with pressure\u2014it passes through a minimum\u2014which is more pronounced in high Ar content mixtures. This behaviour is found to be a consequence of the electron collision processes, in particular the evolution of the non-Maxwellian shape of the electron energy distribution function with pressure. These changes make the electron impact dissociation coefficient follow the same non-monotonic trend with pressure, despite leading to the expected monotonic variation of the ionization rate coefficient. The minimum in dissociation is in correlation with the momentum transfer cross-section profiles of the mixture's components, and occurs approximately at the pressure that satisfies the condition \u03bd<jats:sub>ce<\/jats:sub>\u00a0=\u00a0\u03c9, which explains its dependence on \u03c9.<\/jats:p>","DOI":"10.1088\/0022-3727\/45\/19\/195205","type":"journal-article","created":{"date-parts":[[2012,4,25]],"date-time":"2012-04-25T11:44:02Z","timestamp":1335354242000},"page":"195205","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":18,"title":["O<sub>2<\/sub> dissociation in Ar\u2013O<sub>2<\/sub> surface-wave microwave discharges"],"prefix":"10.1088","volume":"45","author":[{"given":"Kinga","family":"Kutasi","sequence":"first","affiliation":[]},{"given":"Paulo A","family":"S\u00e1","sequence":"additional","affiliation":[]},{"given":"Vasco","family":"Guerra","sequence":"additional","affiliation":[]}],"member":"266","published-online":{"date-parts":[[2012,4,25]]},"reference":[{"key":"jphysd408420bib01","doi-asserted-by":"publisher","first-page":"1429","DOI":"10.1109\/TPS.2002.804203","volume":"30","author":"Philip","year":"2002","journal-title":"IEEE Trans. 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