Total cross sections for electron scattering by CF4, CCl4, CF2Cl2, CClF3 and CFCl3 at 30-5000 eV: A modified additivity rule approach

摘要

The total cross sections for electron scattering by chlorofluoromethane molecules (CF4, CCl4, CF2Cl2, CClF3 and CFCl3) are calculated using a modified additivity rule approach, which takes into consideration the target molecular dimension and the geometric shielding effect in a molecule. The atoms are presented by a spherical complex optical potential which is composed of static, exchange, polarization and absorption terms. The total cross sections are quantitatively compared with those attained by measurements and other theories wherever;available at 30-5000 eV. Good agreement is obtained above 100 eV. (c) 2006 Elsevier B.V. All rights reserved.