Mainz 2026 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 30: Poster – Molecular Spectroscopy
MO 30.9: Poster
Donnerstag, 5. März 2026, 17:00–19:00, Philo 1. OG
Vibrationally resolved core excitation of the CN+ molecular ion — •Maria Tatsch1, Anastasia Andreeva2, B. Michel Döhring1,3, Pierre-Michel Hillenbrand4, Micheal Martins2, Alfred Müller1, Simon Reinwardt2, Jörn Seltmann5, Julius Schwarz2, Florian Trinter6, and Stefan Schippers1,3 — 1I. Physikalisches Institut, Justus-Liebig-Universität Gießen — 2Institut für Experimentalphysik, Universität Hamburg — 3Helmholtz Forschungsakademie Hessen für FAIR (HFHF), GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt — 4GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt — 5Deutsches Elektronen-Synchrotron DESY, Hamburg — 6Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin
Near-edge x-ray absorption fine structure spectroscopy (NEXAFS) is a powerful tool to probe electronic core excitations. At the PETRA III synchrotron facility (DESY, Hamburg) operating at the soft-x-ray beamline P04, the PIPE setup enables photon-ion merged beams experiments. The brilliant PETRA III synchrotron light enables vibrationally resolved core-excitation spectroscopy and provides access to high resolution measurements. Core-excited molecular ions pose several new challenges, such as unpaired valence electrons and core-valence correlation effects. Our results provide the community with valuable benchmark data to guide the development of accurate theoretical descriptions of core-excited diatomic molecules. We present the current status of our data analysis on x-ray absorption studies of CN+ molecular ion.
Keywords: Molecular ions; photoionisation; synchrotrons