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Science 8 March 1991:
Vol. 251. no. 4998, pp. 1218 - 1220
DOI: 10.1126/science.251.4998.1218
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Articles

Auger Electron Angular Distributions from Surfaces: Direct Comparison with Isoenergetic Photoelectrons

LOUIS J. TERMINELLO 1 and JOHN J. BARTON 1

1 IBM T. J. Watson Research Center, Yorktown Heights, NY 10598

Angular distribution patterns of Auger electrons and of photoelectrons from a Cu (001) surface were measured at the same electron kinetic energy. These measurements reveal that the low kinetic energy angular distributions for Cu Auger electrons and Cu 3p3/2 photoelectrons differ substantially. This direct comparison between the photoelectron and Auger electron angular distributions demonstrates that, in some circumstances, the Auger process produces a complicated source wave whose nature must be explored before Auger angular distributions can be used for surface structure analysis.

Submitted on November 13, 1990
Accepted on January 7, 1991

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Science. ISSN 0036-8075 (print), 1095-9203 (online)