Azimuthal scans in LEIS: Influence of the scattering potential

被引：3

作者：

Andrzejewski, R. ^{[1
]}

Kuzmin, V. ^{[2
]}

Boerma, D. O. ^{[3
]}

Primetzhofer, D. ^{[1
]}

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

Bauer, P. ^{[1
]}

机构：

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

[2] Joint Inst Nucl Res, Flerov Lab Nucl React, Dubna 141980, Moscow Reg, Russia

[3] Univ Autonoma Madrid, Ctr Microanal Mat, E-28049 Madrid, Spain

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2009年 / 267卷 / 04期

基金：

奥地利科学基金会;

关键词：

Low-energy ion scattering; Single crystal; Cu(100); Screening length; Interaction potential; Monte-Carlo simulations; ANGULAR SCANS; IONS; COMPUTER;

D O I：

10.1016/j.nimb.2008.11.021

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Angular scans were performed for a Cu(100) single crystal and 3 keV He+ ions. The results were compared to simulations using the Monte-Carlo code TRIC [R. Andrzejewski, Ph.D. thesis, Universidad Autonoma de Madrid, 2008; V.A. Khodyrev, R. Andrzejewski, A. Rivera, D.O. Boerma, J.E. Prieto, in press] to obtain information on the ion-atom interaction. Different potentials were used in the simulations, e.g. the Thomas-Fermi-Moliere potential with a modified screening length and a Hartree-Fock potential. It was found that the experimental results can be very well reproduced by use of two potentials that exhibit a significantly different distance dependence, when properly scaled. This leads to the conclusion that care must be taken when deducing a scattering potential from comparison of experimental and simulated azimuthal scans. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：638 / 641

页数：4

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