SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Poster I
A 12.10: Poster
Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof
Inner-Shell Ionization of Low-Charged Silicon and Iron Ions — •Stefan Schippers1, Alfred Müller1, Simon Reinwardt2, Michael Martins2, and Stephan Fritzsche3,4,5 — 1I. Physikalisches Institut, Justus-Liebig-Universität Gießen — 2Institut für Experimentalphysik, Universität Hamburg — 3GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 4Helmholtz-Institut Jena — 5Institut für Theoretische Physik, Friedrich-Schiller-Universität Jena
We report on recent experimental and theoretical work on single and multiple L-shell photoionization of low-charged iron ions (Fe+, Fe2+, Fe3+) [1-3] and on single and multiple K-shell photoionization of low-charged silicon ions (Si−, Si+, Si2+, Si3+) [4,5]. The experiments were carried out at the photon-ion end-station PIPE of beamline P04 of the PETRA III synchrotron light source. The results are particularly relevant for the determination of the elemental abundances in the interstellar medium. Our data are decisive for being able to answer the question how much of the interstellar iron and silicon is in the gas phase and how much is chemically bound in dust grains. [1] S. Schippers et al., Astrophys. J. 849, 5 (2017). [2] R. Beerwerth et al., Astrophys. J. 887, 189 (2019). [3] S. Schippers et al., Astrophys. J. 908, 52 (2021). [4] A. Perry-Sassmannshausen et al., Phys. Rev. A 104, 053107 (2021). [5] S. Schippers et al., Astrophys. J. 931, 100 (2022).