Information about TS-1 and TS-2 double ionization mechanisms for positron and electron impact ionization of argon

✍ Scribed by R.D. DuBois; J. Gavin; O.G. de Lucio

• Book ID: 103863182
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 177 KB
• Volume: 267
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2008.10.076

✦ Synopsis

Ejected electron angular distributions are measured for single and double ionization of argon by 500 eV positron and electron impact. Double to single ionization ratios show marked differences as a function of projectile charge. Combinations of the positron and electron data and a simple double ionization model are used to obtain differential information about the TS-1 and TS-2 mechanisms. Our analysis suggests that both mechanisms contribute roughly equally to the emission of two electrons and that interference between the two mechanisms significantly alters the ejected electron spectra.