학술논문
Auger- and Photoelectron Coincidences of Molecular O2 Adsorbed on Ag(111)
Document Type
Author
Source
Journal of Electron Spectroscopy and Related Phenomena. 256
Subject
Language
English
ISSN
0368-2048
1873-2526
1873-2526
Abstract
The oxygen on Ag(111) system has been investigated with Auger electron–photoelectron coincidence spectroscopy (APECS). The coincidence spectra between O 1s core level photoelectrons and O KLL Auger electrons have been studied together with Ag3d/AgM4,5NN coincidences. We also describe the electron–electron coincidence spectrometer setup, CoESCA, consisting of two angle resolved time-of-flight spectrometers at a synchrotron light source. Contributions from molecular oxygen and chemisorbed oxygen are assigned using the coincidence data, conclusions are drawn primarily from the O 1s/O KLL data. The data acquisition and treatment procedure are also outlined. The chemisorbed oxygen species observed are relevant for the catalytic ethylene oxidation.