Heidelberg 2015 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 38: Interaction with VUV and X-ray light II
A 38.7: Vortrag
Freitag, 27. März 2015, 12:45–13:00, C/HSW
Excitation energy resolved photon-induced fluorescence spectrum of hydrogen molecules in the regime of singly excited molecular states — •Philipp Schmidt1, Christian Ozga1, Philipp Reiß1, Andreas Hans1, Ltaief Ben Ltaief1, André Knie1, Arno Ehresmann1, Kouichi Hosaka2, Masashi Kitajima2, and Noriyuki Kouchi2 — 1Institut für Physik and Center for Interdisciplinary Nanostructure Science and Technology, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany — 2Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152, Japan
The potential energy landscape of molecules is a fundamental concept to explain and characterize a multitude of molecular processes. The hydrogen molecule is the most abundant molecule in the universe and has been a prototype for calculations of such energy landscapes for a long time. Here we present results for the photon-induced fluorescence spectrum of hydrogen molecules in the far ultraviolet regime after photoexcitation with synchrotron radiation in the energy range between 10 eV and 18 eV. The high resolution of both the excitation source and the fluorescence spectrum in this experiment allows the direct probing of the potential energy diagram. These regimes for the hydrogen molecule in particular cover the excitation into the B and C electronic states as well as the dissociation into neutral and excited hydrogen atoms leading to molecular and atomic fluorescence features showcasing various effects and processes that are not visible in common potential energy calculations.