Berlin 2005 – wissenschaftliches Programm
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MO: Molekülphysik
MO 22: Poster I
MO 22.11: Poster
Samstag, 5. März 2005, 10:30–12:30, Poster HU
Photoelectron spectroscopy of Nan− with n=3-1600 — •Oleg Kostko and Bernd v.Issendorff — Fakultät für Physik, Universität Freiburg, Stefan-Meier-Str. 21, 79104 Freiburg
Size-selected sodium cluster anions with temperatures of T=100 K have been studied by photoelectron spectroscopy in a very broad size range. The spectra exhibit clear structures which in combination with ab initio DFT calculations can be used to identify the geometry of the clusters. Icosahedral symmetry prevails, but other motifs are observed as well. A simple new evaluation technique is introduced which measures the modulation of the photoelectron spectra. Hereby one can compress the whole data set into one single graph, which allows one to easily identify electronic and geometric shell closings.