Semi-empirical formulae for electron impact ionization cross-sections

Abstract

<span style="font-size:14.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:black;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">Semi-empirical formulae and BEB models are used to calculate the total cross -sections of single ionizntion of neutral atoms Mg, Al, Si, P, S by electron impact. The parameters of the semiempirical formulae are obtained by fitting the experimental data on the total cross-section of single ionization of the atoms by electron impact over the range of energy varying from the threshold to 200 eV. It is found that the semi-empirical models give qualitatively as well as quantitatively good fits, while BEB model gives qualitative fits to the reference set of experimental <span style="font-size:14.0pt;line-height:115%;font-family:" times="" new="" roman";="" mso-fareast-font-family:hiddenhorzocr;color:black;mso-ansi-language:en-in;="" mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-IN">data.</span></span>