Why is the positron an ideal particle for studying surface structure?

Authors
Tong, SY
Citation
Sy. Tong, Why is the positron an ideal particle for studying surface structure?, SURF SCI, 457(3), 2000, pp. L432-L436
Citations number
21
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
SURFACE SCIENCE
ISSN journal
00396028 → ACNP
Volume
457
Issue
3
Year of publication
2000
Pages
L432 - L436
Database
ISI
SICI code
0039-6028(20000610)457:3<L432:WITPAI>2.0.ZU;2-6
Abstract
We show that because forward focusing does not occur in tow-energy positron diffraction (LEPD), it is valid to use the linear method in LEPD to find t he global minimum in situations where the method fails for low-energy elect ron diffraction (LEED). Low-energy e(+) diffraction combines the advantages of high surface sensitivity, smooth and slowly varying scattering factor, and no forward focusing, making it a very attractive technique for studying surface structure. (C) 2000 Published by Elsevier Science B.V. All rights reserved.