Absolute cross sections for photoionization of Xeq + ions (1 q 5) at the 3d ionization threshold

S. Schippers, S. Ricz, T. Buhr, A. Borovik, J. Hellhund, K. Holste, K. Huber, H. J. Schäfer, D. Schury, S. Klumpp, K. Mertens, M. Martins, R. Flesch, G. Ulrich, E. Rühl, T. Jahnke, J. Lower, D. Metz, L. P.H. Schmidt, M. SchöfflerJ. B. Williams, L. Glaser, F. Scholz, J. Seltmann, J. Viefhaus, A. Dorn, A. Wolf, J. Ullrich, A. Müller

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The photon-ion merged-beams technique has been employed at the new Photon-Ion spectrometer at PETRA III for measuring multiple photoionization of Xeq + (q = 1-5) ions. Total ionization cross sections have been obtained on an absolute scale for the dominant ionization reactions of the type hν + Xeq + → Xer + + (q - r)e- with product charge states q + 2 r q + 5. Prominent ionization features are observed in the photon-energy range 650-750 eV, which are associated with excitation or ionization of an inner-shell 3d electron. Single-configuration Dirac-Fock calculations agree quantitatively with the experimental cross sections for non-resonant photoabsorption, but fail to reproduce all details of the measured ionization resonance structures.

Original languageEnglish
Article number115602
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number11
Publication statusPublished - Jun 14 2014



  • inner-shell processes
  • photoionization of ions
  • photon-ion merged-beams experiments
  • synchrotron radiation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Schippers, S., Ricz, S., Buhr, T., Borovik, A., Hellhund, J., Holste, K., Huber, K., Schäfer, H. J., Schury, D., Klumpp, S., Mertens, K., Martins, M., Flesch, R., Ulrich, G., Rühl, E., Jahnke, T., Lower, J., Metz, D., Schmidt, L. P. H., ... Müller, A. (2014). Absolute cross sections for photoionization of Xeq + ions (1 q 5) at the 3d ionization threshold. Journal of Physics B: Atomic, Molecular and Optical Physics, 47(11), [115602]. https://doi.org/10.1088/0953-4075/47/11/115602