EPJ

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EPJ D - Atomic, Molecular, Optical and Plasma Physics
Atomic, Molecular, Optical and Plasma Physics
Eur. Phys. J. D 56, 61-66 (2010)
DOI: 10.1140/epjd/e2009-00243-1

Cross section and rate coefficient calculations for electron impact excitation, ionisation and dissociation of the X $^{\mathsf{{1}}}{\mathsf{\Sigma_{g}^{+}}}$, c $^{{\mathsf{3}}}{\mathsf\Pi_\mathsf{u}}$, a $^{\mathsf{3}}{\mathsf\Sigma} _{\mathsf{g}}^{+}$, e $^{\mathsf{3}}{\mathsf{\Sigma_{u}}^{\!\!+}}$ and B$^\prime$ $^{\mathsf{1}}{\mathsf{\Sigma_{u}}}^{\!\!+}$ states of H $_{\mathsf{2}}$

R. Riahi1, Ph. Teulet2, Z. Ben Lakhdar1 and A. Gleizes2

1  Laboratoire de Spectroscopie Atomique, Moléculaire et Applications (LSAMA), Faculté des Sciences de Tunis, Université de Tunis el Manar, 1060 Tunis, Tunisia
2  Laboratoire Plasma et Conversion d'Énergie (LAPLACE), UMR UPS-INP-CNRS 5213, Université Paul Sabatier Toulouse 3, 118 route de Narbonne, 31062 Toulouse Cedex 09, France

riadhzah@yahoo.fr

Received 8 May 2009 / Received in final form 23 June 2009 / Published online 12 September 2009

Abstract
The weighted total cross section (WTCS) theory has been applied to the electron-H2 collision to obtain excitation, ionisation and dissociation cross section and rate coefficients of the X $^{1}\!\Sigma _{g}^{+}$, c $^{3}\!\Pi _{u}$, a $^{3}\!\Sigma _{g}^{+}$, e $^{3}\!\Sigma _{u}^{+}$ and B$^\prime$ $^{1}\!\Sigma _{u}^{+}$ states. Calculation has been performed in the temperature range 1500 K–15000 K. Rate coefficients are calculated from WTCS assuming Maxwellian energy distribution functions for electrons and heavy particles. Thermal equilibrium results are presented and fitting parameters (a, b and c) are given for each reaction rate coefficient: $k(\theta ) = a (\theta ^{b}) $exp( $-c/\theta )$.

PACS
52.20.-j - Elementary processes in plasmas.
82.33.Xj - Plasma reactions.
52.20.Fs - Electron collisions.

© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2009

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