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MM: Fachverband Metall- und Materialphysik

MM 28: Electronic Properties I

MM 28.6: Vortrag

Mittwoch, 25. März 2009, 11:30–11:45, IFW D

Relative Sub-shell Photoionization Cross-sections of Selected Metals Determined by Hard X-ray High Kinetic Energy Photoemission — •Mihaela Gorgoi, Franz Schäfers, Walter Braun, and Wolfgang Eberhardt — BESSY II Elektronenspeicherring, Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Deutschland

Recently, hard x-ray high kinetic energy photoelectron spectroscopy has lead to a break-through due to its non destructive way of investigating the bulk electronic properties of materials. However, due to the relatively new development of this technique there is a lack of information concerning the photoionization cross section at high energies. Whenever compound materials are investigated or when estimating signal levels and the feasibility of an electron spectroscopy experiment the knowledge of cross sections is essential. Thus in the present work we will show the experimentally determined relative sub-shell photoionization cross sections of selected metals in the energy range of 2 to 10 keV. Based on previous experimental studies of Kunz et al. [1] Au 4f cross sections were used as reference. The data will be compared with the calculated sub-shell photoionization cross sections and the differences will be discussed. [1] C. Kunz, S. Thiess, B.C.C. Cowie, T.-L. Lee, J. Zegenhagen, Nuclear lnstruments and Methods in Physics Research A 547, 73-86 (2005).