Diffraction of fast H atoms during grazing scattering from an Al2O3(11(2)over-bar0) surface

被引：6

作者：

Busch, M. ^{[1
]}

Seifert, J. ^{[1
]}

Meyer, E. ^{[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 | 2013年 / 317卷

关键词：

Fast atom diffraction; Quantum scattering; Surface channeling; Insulator surface;

D O I：

10.1016/j.nimb.2012.12.098

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

H atoms with energies up to 1 keV were scattered under a grazing angle of incidence from an Al2O3 (11 (2) over bar0) surface. After preparation of the target by annealing at a temperature of 1700 degrees C well defined angular distributions for scattered projectiles are observed showing for scattering in the regime of axial channeling rich diffraction patterns. For scattering along the low indexed [(1) over bar 100] direction diffraction spots are arranged on a circle which is attributed to full coherence preserved during the collision with the surface. By an azimuthal rotation of the target surface by some degrees Laue circles of higher orders can be observed which is accompanied with a substantial enhancement of resolution for periodicity intervals of the target surface. This is demonstrated by results for the (12 x 4) phase of the Al2O3(11 (2) over bar0) surface which indicate an overall transfer width for fast atom diffraction of several 100 angstrom. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：90 / 95

页数：6

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