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Calculation of Average Collision Cross Sections of Low Energy for Elastic e-Ar Scattering Using MERT4

Published online by Cambridge University Press:  25 June 2014

S. Hassanpour  and
S. Nguyen-Kuok
S. Hassanpour*
Affiliation:
Faculty of Basic Sciences, Department of Physics, Nour Branch, Islamic Azad University, Nour 4817935861, Iran
S. Nguyen-Kuok
Affiliation:
Laboratory of Plasma Physics, National Research University MPEI, Krasnokazarmennya Str. 14, Moscow 111250, Russia
*
†Email address for correspondence: [email protected]
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Abstract

Cross sections in the very low energy range are also represented by the modified effective-range theory (MERT) for low-energy electron scattering from the rare gas (argon). Simulations using published (theoretical) phase shifts indicate that extended versions of the standard effective-range theory with four adjustable parameters are required to give an adequate description of the phase shifts for argon. A four-parameter MERT fit gives a good representation of a recent electron–argon (e-Ar) total cross section experiment at energies less than 10.0 eV. Cross section Q(l) (E) for collision in dilute gases is given for any order l. Here Q(l) (E) are presented for l = 1. . .6. We present calculations for the elastic cross sections for electron scattering from argon. The improvement in the agreement between our theoretical calculations and the experimental measurements in the case of argon in scattering calculations are showed. Differential scattering experiments have been performed for the systems e-Ar in the energy range E = 0–10 eV and the angular range θ = 0–20° using a crossed-beam arrangement. Differential and integrated cross sections for the elastic scattering of low- and intermediate-energy (0–50 eV) electrons by argon atoms are calculated. For each impact energy, the phase shifts of the lower partial waves are obtained exactly by numerical integration of the radial equation. Transport coefficients of argon plasma are requested exactly, which is why we calculated the average collision cross sections for s = 1. . .11, l = 1. . .6.

Type
Research Article
Information
Journal of Plasma Physics , Volume 81 , Issue 1 , January 2015 , 905810102
Copyright
Copyright © Cambridge University Press 2014 

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