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Progress in Plasma Processing of Materials, 1997

ISBN 印刷:
1-56700-093-2

Influence of predissociation on the calculation of dissociation rate coefficients for diatomic gases at high temperature

Jean-Philippe Sarrette
Universite de Toulouse; UPS, INPT; LAPLACE (Laboratoire Plasma et Conversion d'Energie), Bat. 3R2, 118 route de Narbonne, F-31062 Toulouse cedex 9, France; CNRS, LAPLACE, F-31062 Toulouse, France

Anne-Marie Gomes
Centre de Physique des Plasmas & de leurs Applications de Toulouse, ESA 5002 du CNRS, Universite Paul Sabatier, 118 route de Narbonne, 31062 Toulouse cedex4, France

Philippe Teulet
CPAT, Universite Paul Sabatier, 118, Rte de Narbonne, 31062 Toulouse Cx 4, France

要約

We propose a simple semi-empirical method to calculate cross sections and rate coefficients for thermal dissociation of diatomic molecules by electron impact. It is an improvement of Bacri's work /1/ based upon the calculation of weighted total cross sections (WTCS) which is able to take into account predissociation processes. This method is valuable for any electronic state (fundamental as well as excited). An application to the main molecules of air (N2, 02, NO and their positive ions) is given and the computed reaction rates are compared, when possible, with other bibliographical references.