The Valence Band of Free K Clusters Studied by Photoelectron and Auger Spectroscopies
Publikation/Tidskrift/Serie: The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
The valence states of free neutral potassium clusters produced by a gas aggregation source were probed by synchrotron radiation based photoelectron spectroscopy. The first ionization energy (IE) of the clusters was determined to be 10% larger than the work function of bulk potassium. Using electrostatic concepts and the IE, the mean size of the clusters was estimated to be ≈2000 atoms. Further information about the valence band was provided by investigation of the Auger process initiated by the ionization of the 3p level with a subsequent emission of an Auger electron from the valence band (M2,3VV). Plasmon satellites were observed in Auger spectra of free metal clusters.
- Physics and Astronomy
- 36.40.-c Atomic and molecular clusters
- 73.22.-f Electronic structure of nanoscale materia
- 79.60.-i Photoemission and photoelectron spectra
- ISSN: 1434-6060