Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 19: Photoionization
A 19.1: Hauptvortrag
Dienstag, 18. März 2014, 14:00–14:30, BEBEL E42
The molecular double slit: transition from random to oriented target properties — •Gregor Hartmann1,2, Markus Braune3, Jens Viefhaus3, André Meissner1, Toralf Lischke1,2, Axel Reinköster1, Burkhard Langer4, Sascha Deinert3, Leif Glaser3, Frank Scholz3, Jörn Seltmann3, Markus Ilchen3, André Knie5, Philipp Schmidt5, Arno Ehresmann5, Omar Al-Dossary6, and Uwe Becker1,2,6 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin — 2Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle — 3DESY, Notkestraße 85, 22067 Hamburg — 4Physikalische Chemie, FU Berlin, Takustr. 3, 14195 Berlin — 5Institut für Physik, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel — 6Physics Department, King Saud University, Riyadh 11451, Saudi Arabia
The analogy of homonuclear diatomic molecules to the Young type double slit experiment such as Cohen-Fano cross section oscillations has been topic of a large amount of photoionization investigations. Here, the hydrogen molecule's cross section oscillations are analyzed over a large photon energy range (29eV-1200eV) distinguishing between the randomly in space distributed molecule and the 'oriented sample', in which the orientation of the molecular axis to the light polarization vector is detected. Furthermore, a transition effect from random to oriented target properties is detected, when the de Broglie wave length of the photoelectron resolves the internuclear distance. The ion fragment angular distribution is analyzed and found as a reason for the transition.