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Influence of non-thermal shielding on the Ramsauer phenomena for the electron–atom-induced dipole scattering in Lorentzian plasmas

Published online by Cambridge University Press:  24 August 2012

DAE-HAN KI  and
YOUNG-DAE JUNG
DAE-HAN KI
Affiliation:
Department of Applied Physics, Hanyang University, Ansan, Kyunggi-Do 426-791, South Korea
YOUNG-DAE JUNG
Affiliation:
Department of Applied Physics, Hanyang University, Ansan, Kyunggi-Do 426-791, South Korea Department of Electrical and Computer Engineering, MC 0407, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0407, USA (ydjung@hanyang.ac.kr)
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Abstract

The non-thermal shielding effects on the Ramsauer phenomena for the electron–atom-induced dipole scattering are investigated in Lorentzian plasmas. The phase theory and the modified Buckingham-type potential are employed to obtain phase shift and collision cross section as functions of spectral index, scattering length, polarizability, collision energy, and the Debye radius. It is found that the non-thermal effect enhances the collision cross section below the Ramsauer energy and suppresses the collision cross section above the Ramsauer energy. In addition, it is found that the non-thermal effect enhances the Ramsauer energy in Lorentzian plasmas.

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Type
Papers
Information
Journal of Plasma Physics , Volume 79 , Issue 1 , February 2013 , pp. 113 - 117
Copyright
Copyright © Cambridge University Press 2012

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