Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 18: Interaction with VUV and X-Ray light
A 18.6: Vortrag
Mittwoch, 21. März 2007, 18:00–18:15, 6G
Core-Level Photoelectron Spectroscopy on Mass-Selected Lead Clusters using VUV-FEL Radiation — Volkmar Senz1, •Tim Fischer2, Patrice Oelßner1, John Neville3, Markus Schöffler4, Jörg Stanzel5, Heiko Thomas6, Matthias Neeb5, Josef Tiggesbäumker1, Michael Martins7, Eckart Rühl8, Christoph Bostedt6, Wolfgang Eberhardt5, Gerd Ganteför2, Thomas Möller6, Horst Schmidt-Böcking4, Reinhard Dörner4, Wilfried Wurth7, and Karl-Heinz Meiwes-Broer1 — 1Universität Rostock — 2Universität Konstanz — 3University of New Brunswick, Canada — 4Universität Frankfurt am Main — 5BESSY Berlin — 6Technische Universität Berlin — 7Universität Hamburg — 8Freie Universität Berlin
Metal clusters are known to exhibit new and interesting catalytic, chemical and magnetic properties. In particular, the number of atoms has a pronounced influence on the electronic and geometric structure.
A promising method to study these variations is VUV photoelectron spectroscopy of mass selected clusters. However, for investigation of the complete valence band and shallow core levels, no photon source except the free-electron-laser FLASH at HASYLAB/DESY is available at the moment. Only this source provides the appropriate radiation of several tens of eV with sufficient high photon flux.
First promising results, featuring a size-dependent core-level shift, have been obtained.