The relative intensity of positron annihilation-induced auger electron emission from iron, copper, palladium and gold.

摘要

Positron Annihilation-induced Auger Electron Spectroscopy (PAES) makes use of electron-positron annihilation to create core holes which result in Auger electron emission. This unique excitation process provides PAES with significantly higher surface selectivity than conventional Auger techniques. We report the first PAES measurements of Pd and Au along with PAES measurements of Cu and Fe. The analysis of our PAES data indicates that the intensities of the low energy Auger signals of Fe, Cu, Pd,and Au are in the proportion of 1: 2.3: 2.4: 2.2. These measurements show the same trends as theoretical calculations and will provide elemental standards for investigations of epitaxial growth and/or intermixing in bimetallic systems. Also the sensitivity of PAES to H