Mainz 2026 – scientific programme
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A: Fachverband Atomphysik
A 32: Interaction with VUV and X-ray Light I (joint session A/MO)
A 32.7: Talk
Thursday, March 5, 2026, 16:15–16:30, N 2
K-edge core excitation and ionization of singly charged sulfur cations — •Simon Reinwardt1, Patrick Cieslik1, Ticia Buhr2, Alexander Perry-Sassmannshausen3, Stefan Schippers3, Alfred Müller3, Stephan Fritzsche4,5, Florian Trinter6, and Michael Martins1 — 1Universität Hamburg, Hamburg, Germany — 2Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany — 3Justus-Liebig-Universität Gießen, Gießen, Germany — 4Friedrich-Schiller-Universität Jena, Jena, Germany — 5Helmholtz-Institut Jena, Jena, Germany — 6Fritz-Haber-Institut, Berlin, Germany
Near-edge X-ray absorption spectroscopy on sulfur cations provides important reference data for X-ray telescopes and to investigate tender or soft X-ray induced fragmentation processes on sulfur-containing molecular ions. Using the photon-ion merged-beams technique, implemented at the Photon-Ion Spectrometer at PETRA III [1], we measured relative cross sections for twofold, threefold, fourfold, and fivefold photoionization of singly charged sulfur cations in the photon-energy range from 2460 eV to 2510 eV. To theoretically describe the relative cross sections of the different product charge states, we have calculated decay cascades with the Jena Atomic Calculator [2].
- [1] S. Schippers et al., J. Phys. B 47, 115602 (2014).
- [2] S. Fritzsche, Comput. Phys. Commun. 240, 1 (2019).
Keywords: Sulfur; Core excitation; Photoionization; Tender X-ray; Soft X-ray