Stuttgart 2012 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MO: Fachverband Molekülphysik
MO 20: Atomic clusters (with A)
MO 20.4: Talk
Thursday, March 15, 2012, 15:15–15:30, V57.05
Core-level photoelectron spectroscopy on free mass-selected Gold clusters at the free-electron laser FLASH — •Patrice Oelßner1, Jens Bahn1, Michael Köther1, Christian Braun2, Volkmar Senz1, Steffen Palutke3, Michael Martins3, Gerd Ganteför2, Bernd von Issendorff4, Josef Tiggesbäumker1, and Karl-Heinz Meiwes-Broer1 — 1IfPh, Uni-Rostock — 2FB Physik, Uni-Konstanz — 3IfExp. Physik, Uni Hamburg — 4Fak. f. Physik, Uni Freiburg
A promising method to investigate the electronic structure of clusters is core-level photoelectron spectroscopy as used extensively in surface science [Phys. Rev. Lett. 102, 138303 (2009)]. The VUV free electron laser FLASH at DESY delivers intense light with a wavelength down to 4.8 nm (258 eV) to allow such studies. With a hemispherical analyzer equipped with a Delay-Line-Detector we studied core-level-binding energies. Results on mass-selected gold clusters anions from 45 to 150 atoms show a size-dependent 4f core-level shift as predicted by the metal sphere model [Phys. Rev. B 50,5744 (1994)]. By measuring the gold 4f binding energies of anions and cations as a function of cluster-size one can calculate, e.g. the chemical potential.