Neutralization of low energy He+ ions by Cu in the Auger regime

✍ Scribed by S.N. Markin; D. Primetzhofer; J.E. Valdés; E. Taglauer; P. Bauer

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 188 KB
• Volume: 258
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2006.12.081

✦ Synopsis

Neutralization of light 4 He + ions in backscattering geometry is studied on a single crystalline Cu(1 0 0) and on a poly crystalline Cu-poly surfaces by means of direct comparison of the ion yields. Below 2 keV neutralization is only restricted to the Auger transition involving two electrons. Measurements in this regime revealed a $35% higher ion fraction for the single crystal Cu(1 0 0) with respect to the Cu-poly. The observed difference in the neutralization probability is ascribed to a different extension of the electron jellium edge, resulting from different atomic arrangement.