Eur. Phys. J. Appl. Phys. 47, 11001 (2009)
https://doi.org/10.1051/epjap/2009104

Comment on "Diagnostics of 13.56 MHz RF sustained Ar-N₂ plasma by optical emission spectroscopy" by F.U. Khan, N.U. Rehman, S. Naseer, M.A. Naveed, A. Qayyum, N.A.D. Khattak and M. Zakaullah

¹ Laboratoire de Spectrométrie Physique, Université Joseph Fourier and CNRS, BP 87, 38402 Saint Martin d'Hères, France
² Laboratoire des Technologies de la Microélectronique, CNRS, 17 rue des Martyrs, 38054 Grenoble Cedex 09, France
³ Instituto de Astrofísica de Andalucia, CSIC, P.O. Box 3004, 18080 Granada, Spain

Corresponding author: Nader.Sadeghi@ujf-grenoble.fr

Received: 9 March 2009
Accepted: 24 April 2009
Published online: 5 June 2009

Abstract

Several important errors and misinterpretations present in a recent publication by Khan et al. [Eur. Phys. J. Appl. Phys. 45, 11002 (2009)] are pointed out and discussed. In particular, it is shown that the method used to calculate the rate coefficients for the electron impact excitation of 3p⁵4p and 3p⁵5p states of argon is incorrect and leads to unrealistically high rate coefficients.