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O: Fachverband Oberflächenphysik
O 48: Poster Session - Electronic Structure of Surfaces: Spectroscopy, Surface States
O 48.6: Poster
Dienstag, 17. März 2020, 18:15–20:00, P2/EG
Improved numerical reconstruction method for Metastable Induced Electron Spectra of molecules — •Wichard J. D. Beenken1, Tobias B. Gäbler2,3, Erich Runge1, and Stefan Krischok1 — 1Technische Universität Ilmenau, Institut für Physik, Ilmenau, Germany — 2Friedrich-Schiller-Universität Jena, Institut für Angewandte Physik, Jena, Germany — 3Fraunhofer Institut für Angewandte Optik und Feinmechanik IOF, Jena, Germany
Metastable Induced Electron Spectroscopy (MIES) is arguably the most surface-sensitive spectroscopic method. Thus, it has been used, e.g., to study molecular layers of organic molecules [1] and the composition of ionic liquids [2,3]. Of particular interest are the orientations of the molecules and ions to the surface plane. In order to obtain this information, detailed reconstructions of the MIES spectra based on quantum-chemical calculations of the molecule in combination with a simulation of many trajectories of the impinging metastable helium atoms including shadowing effects are required. The latter makes such an analysis numerically very costly. We present recent progress in the numerical simulation of MIES spectra. [1] J. Günster, G. Liu, V. Kempter, D.W. Goodman, Surf. Sci. 415 (1998) 303-311. [2] T. Ikari, A. Keppler, M. Reinmöller, W.J.D. Beenken, S. Krischok et al., Surf. Sci. Nanotech. 8 (2010) 241-245. [3] A. Ulbrich, M. Reinmöller, W.J.D. Beenken, S. Krischok, Chem. Phys. Chem. 13 (2012) 1718-1724.