Is PEXAFS really PhD?

Citation
Rl. Toomes et al., Is PEXAFS really PhD?, SURF SCI, 445(2-3), 2000, pp. 300-308
Citations number
31
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
SURFACE SCIENCE
ISSN journal
00396028 → ACNP
Volume
445
Issue
2-3
Year of publication
2000
Pages
300 - 308
Database
ISI
SICI code
0039-6028(20000120)445:2-3<300:IPRP>2.0.ZU;2-5
Abstract
Scanned-energy mode photoelectron diffraction (PhD) measurements from the d isordered chemisorption phase formed by oxygen on Cu(lll), over a wide rang e of emission directions, are compared with published surface extended X-ra y absorption fine structure (EXAFS) data from the same system. The results show that so-called photoemission EXAFS ('PEXAFS') data, even when measured over a wide angular acceptance from a disordered surface, do not reflect t he true EXAFS spectrum but are actually dominated by photoelectron diffract ion. Quantitative analysis of these data leads to the conclusion that there are likely to be serious systematic errors in all previous PEXAFS analyses . (C) 2000 Published by Elsevier Science B.V. All rights reserved.