Valence-shell single photoionization of Kr${}^{+}$ ions: Experiment and Theory

Abstract

Photoionization of Kr${}^{+}$ ions was studied in the energy range from 23.3 eV to 39.0 eV at a photon energy resolution of 7.5 meV. Absolute measurements were performed by merging beams of Kr${}^{+}$ ions and of monochromatized synchrotron undulator radiation. Photoionization (PI) of this Br-like ion is characterized by multiple Rydberg series of autoionizing resonances superimposed on a direct photoionization continuum. Resonance features observed in the experimental spectra are spectroscopically assigned and their energies and quantum defects tabulated. The high-resolution cross-section measurements are benchmarked against state-of-the-art theoretical cross-section calculations from the Dirac-Coulomb R-matrix method.

13 pages, 5 figures, 5 tables, Physical Review A, accepted for publication; Physical Review A (2012)

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• Updated Atomic Data and Calculations for X-ray Spectroscopy
• The Abundances of Light Neutron-Capture Elements in Planetary Nebulae II. s-process Enrichments and Interpretation
• Photoionization Cross-Sections for the trans-iron element Se${}^{+}$ from 18 eV to 31 eV
• Photoionization cross section calculations for the halogen-like ions Kr${}^{+}$ and Xe${}^{+}$

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• Photoionization of the valence shells of the neutral tungsten atom
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• Photoionization of tungsten ions: experiment and theory for W${}^{4+}$
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