Neutralization of keV Ne+ and Ar+ ions during grazing scattering from an Al(111) surface

被引：2
作者：
Wethekam, S [1 ]
Adamov, G [1 ]
Winter, H [1 ]
机构：
[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2005年 / 230卷
关键词：
charge exchange; ion surface scattering; Auger neutralization; noble gas ions; metal surface;
D O I：
10.1016/j.nimb.2004.12.059
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Charge fractions after scattering of Ne+ ions, Ne-0 atoms and Ar+ ions with keV energies under a grazing angle of incidence from an atomically clean and flat Al(111) surface are studied. For incoming Ne+ ions we observe defined ion fractions in the scattered beams, whereas for incident Ne-0 atoms ion fractions are more than one order of magnitude smaller. This experimental result provides clear evidence for a survival of Ne+ ions over the whole scattering event. From the dependence of ion fractions on the perpendicular energy component we derive neutralization rates as function of distance from the surface. These rates compare well with recent theoretical calculations for the system He+-Al(111). For incident Ar+ ions no survival of ions is found and upper limits for the survival probability and lower limits for the neutralization rate are determined. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：305 / 310
页数：6
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