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dc.contributor.authorCamacho, J. J.-
dc.contributor.authorSantos, M.-
dc.contributor.authorDíaz Sol, Luis-
dc.contributor.authorPoyato, J. M. L.-
dc.identifierdoi: 10.1088/0022-3727/41/21/215206-
dc.identifierissn: 0022-3727-
dc.identifier.citationJournal of Physics D - Applied Physics 41: 215206 (2008)-
dc.description.abstractLaser-induced breakdown (LIB) spectroscopy in oxygen at room temperature and pressures ranging from 4.6 to 75 kPa was studied using a high-power transverse excitation atmospheric CO2 laser (λ = 9.621 and 10.591 νm; τFWHM = 64 ns; power densities ranging from 0.87 to 6.31 GW cm-2). The spectrum of the generated plasma is dominated by emission of strong O, O+ and weak O2+ atomic lines. Excitation temperatures of 31 500 1600 K and 23 000 3000 K were estimated by means of O2+ and O+ ionic lines, respectively. Electron number densities of the order of (3.5-16.5) × 1016 cm -3 were deduced from the Stark broadening of several ionic O + lines. The characteristics of the spectral emission intensities from different species have been investigated as functions of the oxygen pressure and laser irradiance. Optical breakdown threshold intensities in O 2 at 10.591 νm have been determined. The physical processes leading to LIB of oxygen have been analysed. © 2008 IOP Publishing Ltd.-
dc.description.sponsorshipThe authors acknowledge the support received in part by the DGICYT (Spain) Projects: MEC: CTQ2007-60177/BQU and MEC: CTQ2008-05393/BQU for this research.-
dc.publisherInstitute of Physics Publishing-
dc.titleOptical emission spectroscopy of oxygen plasma induced by IR CO2 pulsed laser-
dc.description.versionPeer Reviewed-
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