The valence band of free K clusters studied by photoelectron and Auger spectroscopies |
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| Authors: | A Rosso G Öhrwall S E Canton S Legendre I L Bradeanu S Svensson O Björneholm M Tchaplyguine |
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| Institution: | 1.MAX-lab, Lund University,Lund,Sweden;2.Department of Physics and Material Science,Uppsala University,Uppsala,Sweden;3.Department of Chemical Physics,Lund University,Lund,Sweden |
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| Abstract: | 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. |
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