Hannover 2013 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 14: Poster 1: Cluster, Femtosecond Spectroscopy
MO 14.31: Poster
Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof
Cluster Mass Spectroscopy at PIPE — Ivan Baev, Steffen Palutke, Karolin Mertens, •Stephan Klumpp, and Michael Martins — Institut für Experimentalphysik, Universität Hamburg
Metal clusters of various type have great variations of their properties, like their geometric structure, their magnetism or their catalytic behavior. Especially, not looking on different members of the periodic table, but on clusters of the same elements but different number of atoms (each atom counts). Using the ICARUS cluster source we produced a beam of small metal clusters of kinetic energy between 500eV and 2000eV of different atom species, like Fe, Co, FeRh, etc., and mixed these clusters at two different points, within the source itself, and right after the source, with reactive gases, like O2, CO or N2O. The resulting reactants were mass-to-charged analyzed with the 1.5T ion preparation dipole magnet of PIPE (Photo-Ion-Spectrometer at PETRA III) at P04, DESY. In first commissioning measurements with Xe+ ions it could be shown the mass resolution of this magnet varies between m/Δ m ≈ 170 − 920 only depending on the width of the exit slits. We will present mass spectra of the reaction between the produced clusters and the used reactive gases depending on different parameters, like ion beam kinetic energy, reactive gas pressure and interaction volume in the cluster source.