Auger photoelectron coincidence spectroscopy

Auger photoelectron coincidence spectroscopy (APECS) is a technique that pr ovides us with unique information and a chance to gain insight into the sig nificance of processes in the Auger spectra of atoms in solids. Hence it is a great aid in our understanding of the Auger process in atoms where elect ron correlations are strong. Despite the first demonstration of the techniq ue more than 20 years ago, there are still very few working experiments. Th e reasons why, and the ways forward are discussed. (C) 1999 Elsevier Scienc e B.V. All rights reserved.