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Title: Argon plasma modeling with detailed fine-structure cross sections
Authors: Gangwar R.K.
Sharma, Lalita
Srivastava, Rajesh
Stauffer A.D.
Published in: Journal of Applied Physics
Abstract: Our recently reported fully relativistic distorted-wave electron-impact cross sections from the ground and metastable states of argon to various excited fine-structure levels are incorporated in a collisional-radiative model to obtain the population densities for the 3p 54s and 3p 54p (1s and 2p) fine-structure manifolds for low temperature argon plasmas. Excitation cross sections from the two 3p 54s J 1 resonance levels, 1s 2 and 1s 4, to the higher lying 2p fine-structure manifold as well as for transitions among individual levels of the 1s and 2p manifolds are also calculated and included in the present model which were not fully considered in any earlier model. Our results for the population densities of the 1s and 2p levels show good agreement with recent measurements. The variation of population densities of all the 1s and 2p levels with electron temperature and density are presented. We have also calculated and compared the intensities for the 750.38 nm (2p 1 → 1s 2) and 696.54 nm (2p 2 → 1s 5) lines with recently reported experimental results. The present work suggests that the inclusion of a complete fine-structure description of the electronic processes occurring in the plasma is important for a collisional radiative model, which includes separate 1s and 2p levels. © 2012 American Institute of Physics.
Citation: Journal of Applied Physics (2012), 111(5): -
Issue Date: 2012
ISSN: 218979
Author Scopus IDs: 34881656500
Author Affiliations: Gangwar, R.K., Department of Physics, Indian Institute of Technology, Roorkee 247667, India
Sharma, L., Department of Physics, Indian Institute of Technology, Roorkee 247667, India
Srivastava, R., Department of Physics, Indian Institute of Technology, Roorkee 247667, India
Stauffer, A.D., Department of Physics and Astronomy, York University, Toronto M3J 1P3, Canada
Funding Details: We are very thankful to Professor J. A. M. van der Mullen, Dr. Wouter Graef, Dr. X. M. Zhu and Professor Y. K. Pu for their useful suggestions and discussions. We are grateful to Dr. Zhu for sending data of OES measurements and CR model results in numerical form. R.K.G. is thankful to CSIR, New Delhi for financial assistance. R.S. would like to acknowledge research grants in support of this work from Council of Scientific and Industrial Research (CSIR), New Delhi and International Atomic Energy Agency (IAEA), Vienna. A.D.S. acknowledges a grant from NSERC Canada.
Corresponding Author: Srivastava, R.; Department of Physics, Indian Institute of Technology, Roorkee 247667, India; email:
Appears in Collections:Journal Publications [PH]

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