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

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Glaser,  L.
Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Schippers, S., Ricz, S., Buhr, T., Borovik, A., Hellhund, J., Holste, K., et al. (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. doi:10.1088/0953-4075/47/11/115602.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-BA23-F
Abstract
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.