Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 46: Nanostructures and Clusters
O 46.6: Vortrag
Mittwoch, 13. März 2013, 11:45–12:00, H45
Mass selected copper and silver clusters on rare gas layers: Photoelectron spectroscopy with ultraviolet light — •Christoph Schröder1, Natalie Miroslawski1, Paul Salmen1, Bernd von Issendorff2, and Heinz Hövel1 — 1Fakultät Physik / DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany — 2Fakultät für Physik, Universität Freiburg, 79104 Freiburg, Germany
Mass selected CuN and AgN clusters, with N=55,92,147 were soft landed at T=15K-25K on different substrates covered with rare gas layers. Up to 9 spots, with different cluster size and coverage, could be deposited on one and the same sample for better comparability. These spots were investigated by ultraviolet photoelectron spectroscopy using 11.6 eV photon energy in ultrahigh vacuum (UHV). In order to cut off the satellite of the ultraviolet light and achieving an UHV below 10−10 mbar we used a LiF window [1]. Caused by the low photon energy we obtained a size dependent cluster signal for energies in the s-p-band region which are discussed in respect of free beam experiments [2].
[1] M.Budke and M.Donath, Appl. Phys. Lett. 92, 231918 (2008); S.Suga et al., Rev. Sci. Instruments 81, 105111 (2010)
[2] Oleg Kostko, Photoelectron spectroscopy of mass-selected sodium, coinage metal and divalent metal cluster anions. PhD-thesis, Albert-Ludwig-Universität Freiburg (2007)