SAMOP 2023 – scientific programme
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MO: Fachverband Molekülphysik
MO 13: Poster II
MO 13.3: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
UV Photoexcitation-Photoemission Map of the Hydrogen Molecule — •Gabriel Klassen1, Andreas Hans1, Philipp Schmidt2, Catmarna Küster-Wetekam1, Johannes Viehmann1, and Arno Ehresmann1 — 1Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany — 2European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
The hydrogen molecule, the simplest molecule we know, has been studied extensively in the past. Although most of the details of its electronic potentials are well understood, there is no complete set of experimentally determined absolute data with quantitative absorption and dispersed emission cross sections. These cross sections, however, are necessary to interpret spectra of gaseous clouds in space, where H2 may be used as a probe molecule, once its cross sections are known.
On the road towards such a full data set for the hydrogen molecule we are performing experiments where H2 is excited by small-bandwidth monochromatized synchrotron radiation and its emission is recorded dispersedly with high resolution. By scanning synchrotron radiation over parts of the UV spectrum and measuring the consecutive fluorescence we are able to construct a 2d-map with distinct features being representative for the H2 rovibronic structure.