Diagnostics of a Hydrocarbon Plasma Jet Using the A2Δ-X2Π System of CH
J. Koulidiatia, A. Czernichowskib, J.J. Beulensc and D.C. Schramc
aUniversité de Ouagadougou, Département de Physique, B.P. 7021 Ouagadougou 03, Burkina Faso
bUniversité d'Orléans, Faculté des Sciences, B.P. 6759, 45067 Orléans Cedex 2, France
cEindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
Received: January 27, 1998; revised version June 29, 1998
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We study the intensity distribution of the A2Δ-X2Π system of CH molecule at 430 nm in a low pressure plasma jet. This system shows an overlap of vibrational bands with Δv=0. By comparing simulated and experimental emission spectra, we obtain rotational and vibrational temperatures using Boltzmann plots or some thermometer functions. The thermometer functions are the integrated intensities of line-like transitions composed of several rotational transitions. The result of the Boltzmann plots and the thermometer functions method that we propose are in good agreement.
DOI: 10.12693/APhysPolA.94.3
PACS numbers: 07.20.Dt, 52.70.Kz, 33.20.-t