Stopping of low energy protons during grazing scattering from a LiF(001) surface

被引：7
|
作者：
Winter, H [1 ]
Auth, C [1 ]
Mertens, A [1 ]
机构：
[1] Humboldt Univ, Inst Phys, D-10115 Berlin, Germany
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2000年 / 164卷
关键词：
D O I：
10.1016/S0168-583X(99)01143-X
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Protons with energies ranging from 300 eV to 25 keV are scattered under glancing angles of incidence from a flat and clean LiF(001) surface. We have recorded energy spectra for specularly reflected projectiles and analyze the data in terms of stopping cross-sections. From our analysis we deduce a threshold behaviour for electronic stopping at the low energy end. We find pronounced effects on energy loss owing to charge exchange and excitation of valence band electrons. At energies below 1 keV energy dissipation proceeds predominantly via excitation of optical phonons. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：559 / 565
页数：7
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