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

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Science  08 Mar 1991:
Vol. 251, Issue 4998, pp. 1218-1220
DOI: 10.1126/science.251.4998.1218


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.

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