A Multichannel Monitor for Repetitive Auger Electron Spectroscopy with Application to Surface Composition Changes
作者:
E. N. Sickafus,
A. D. Colvin,
期刊:
Review of Scientific Instruments
(AIP Available online 1970)
卷期:
Volume 41,
issue 9
页码: 1349-1354
ISSN:0034-6748
年代: 1970
DOI:10.1063/1.1684816
出版商: AIP
数据来源: AIP
摘要:
A multichannel monitor has been designed to shorten the effective scanning time of Auger electron spectroscopy. The circuitry of the multichannel monitor is described with specific reference to its application to the second derivative curve of a retarding potential analyzer. By adopting the monitor to a retarding potential analyzer of a LEED system, sufficiently fast response time has been obtained to permit various kinds of surface kinetics to be monitored. By way of illustrating the use of the monitor, results are given of surface composition changes on the Ni(110) surface that accompany heating subsequent to adsorption at room temperature. It was found, for example, that surface carbon may cover surface sulfur and, consequently, on heating the latter suddenly appears as a result of the removal of carbon. In this manner the nature of surface sites occupied by various surface species can be characterized. And by monitoring the kinetics specific activation energies may be determined.
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