Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 16: Photoionization
A 16.1: Vortrag
Dienstag, 19. März 2013, 11:00–11:15, F 428
The effect of dimensionality in the photoionization of inversion symmetric systems — •Markus Ilchen1,2, Uwe Becker3,7, Piero Decleva4, Marshaal AlKhaldi7, Markus Braune2, Sascha Deinert2, Leif Glaser2, Gregor Hartmann3, André Knie5, Burkhard Langer6, André Meissner3, Frank Scholz2, Jörn Seltmann2, Peter Walter2, Omar Al-Dossary7, and Jens Viefhaus2 — 1European XFEL GmbH — 2Deutsches Elektronen Synchrotron DESY — 3MPI für Mikrostrukturphysik Halle — 4Universita di Trieste — 5Universität Kassel — 6Freie Universität Berlin — 7King Saud University
Quantum coherence and resulting interferences are widely studied fields of atomic and molecular physics highlighting quantum mechanics in an impressive way. One of the most famous experiments in this respect is the molecular double slit experiment which was predicted to reveal fingerprints of coherent electron emission from the valence of inversion symmetric systems. We will show results for partial ionization cross sections as well as angular distributions of N2, O2 and also C60 providing first experimental proofs of the Cohen-Fano oscillations. For N2 and O2 the σ and β-oscillations are phase shifted by π for the valence gerade states and parallel for the ungerade states. For C60 our results show that the three-dimensionality of this system leads to an anti-parallel behavior. The important role of dimensionality in studies of inversion symmetric systems will be discussed.