The effect of crystalline structure on molecular effect in ion-induced electron emission

被引：0

作者：

Andrianova, N. N. ^{[1
]}

Borisov, A. M. ^{[1
]}

Mashkova, E. S. ^{[1
]}

Nemov, A. S. ^{[1
]}

Parilis, E. S. ^{[2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119991, Russia

[2] CALTECH, Pasadena, CA 91125 USA

来源：

VACUUM | 2008年 / 82卷 / 09期

关键词：

ion-induced electron emission; molecular effect; ion channeling; transparency model;

D O I：

10.1016/j.vacuum.2007.12.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The results of experimental and theoretical study of the molecular effect in ion-induced electron emission from single crystal and polycrystalline materials are presented. It has been found that the electron emission yield gamma(2) under N-2(+) bombardment of a single crystal shows a dependence on ion incidence angle theta, which is analogous to the anisotropy of the yield, under N+ impact. The ratio R-2(theta)=gamma(2)/2 gamma(1)< 1 exhibits, for single crystals, a drastic angular dependence, which was successfully described on the basis of electron sweeping-out mechanism by conjunction of both the sharp channeling at theta <psi(L) and the shadowing-caused bell-like pattern at theta >psi(L), the Lindhard angle. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：906 / 910

页数：5

共 38 条

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