IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Applied Surface Analysis Monday Sessions
       Session AS-MoA

Paper AS-MoA1
Satellite Structure in the KLL Auger spectra of Ge

Monday, October 29, 2001, 2:00 pm, Room 134

Session: Quantitative Analysis and Data Interpretation II: Electron Spectroscopies
Presenter: L. Kövér, Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary
Authors: L. Kövér, Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary
I. Cserny, Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary
J. Tóth, Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary
D. Varga, Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary
Z. Berényi, Institute of Nuclear Research of the Hungarian Academy of Sciences, Hungary
Correspondent: Click to Email
Studying deep core Auger spectra in materials of practical interest is important for understanding solid state effects on Auger processes as well as for revealing the electronic structure of these systems, including localization and charge transfer. Very intense satellites were observed in the KLL Auger spectra of some 3d metals and alloys@footnote 1@ and in the LMM spectra of 4d metals@footnote 2@ in previous studies. An earlier work on the Ge KLL Auger spectra excited by Mo K@alpha@ radiation from a thin film of ca 10 nm thickness@footnote 3@ identified the presence of a strong satellite as due to the effect of inelastic electron scattering. Here we report the first high energy resolution measurements of the Ge KLL spectra. The spectra were excited by bremsstrahlung (using an X-ray source with Cu anode) from amorphous Ge overlayers of different, several ten nm thickness, deposited onto a Si substrate. Measurements of the KLL spectra were performed using a high energy hemispherical electron spectrometer.@footnote 4@ For identifying the nature of the satellite structure and the contributions from extrinsic and intrinsic processes, the spectra are compared to the corresponding energy loss spectra of backscattered electrons and the shape of the KLL spectra is analyzed using different models for inelastic background correction. This work was supported by the project OTKA T026514. @FootnoteText@ @footnote 1@ L. Kövér, Zs. Kovács, J. Tóth, I. Cserny, D. Varga, P. Weightman, S. Thurgate, Surface Sci. 433-435(1999)833. @footnote 2@ G.G. Kleiman, S.G.C. De Castro,R. Landers, Phys. Rev. B49(1994)2753. @footnote 3@ E. Sokolowski, C. Nordling, Arkiv för Fysik 14(1958)557. @footnote 4@ L. Kövér, D. Varga, I. Cserny, J. Tóth, K. Tökési, Surf. Interface Anal., 19(1992)9.