Influence of surface structure and composition on neutralization of 4He+ ions scattered from noble metals and alloy surfaces

被引：20

作者：

Primetzhofer, D. ^{[1
]}

Spitz, M. ^{[1
]}

Markin, S. N. ^{[1
]}

Taglauer, E. ^{[2
]}

Bauer, P. ^{[1
]}

机构：

[1] Johannes Kepler Univ Linz, Inst Expt Phys, A-4040 Linz, Austria

[2] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 12期

基金：

奥地利科学基金会;

关键词：

LOW-ENERGY HE+; AUGER NEUTRALIZATION; ADSORPTION; SIMULATION; EXCHANGE; OXYGEN; LEIS;

D O I：

10.1103/PhysRevB.80.125425

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experiments to deduce ion fractions P+ of He+ ions scattered from Ag(110) and various Au surfaces in the low-energy ion scattering (LEIS) energy regime (0.6-9 keV) were performed by means of time-of-flight-LEIS. For Au, P+ was measured for a Au(110) 1 x 2 reconstructed surface, a Cu0.5Au0.5(100) alloy crystal, and for polycrystalline Au. The well-ordered atomic structure of Cu0.5Au0.5(100) could be easily resolved. The results clearly indicate that P+ may depend strongly on the geometry and composition of the surface investigated. For Au(110) a remarkably high fraction of surviving ions from the surface layer was deduced from the experimental results.

引用

页数：6

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