Journal article

Physical mechanisms and scaling laws of K-shell double photoionization

  • Hoszowska, Joanna Department of Physics, University of Fribourg, Switzerland
  • Kheifets, A. K. Research School of Physical Sciences, Australian National University, Canberra, Australia
  • Dousse, Jean-Claude Department of Physics, University of Fribourg, Switzerland
  • Berset, Michel Department of Physics, University of Fribourg, Switzerland
  • Bray, I. ARC Centre for Matter-Antimatter Studies, Curtin University, Perth, Australia
  • Cao, Wei Department of Physics, University of Fribourg, Switzerland
  • Fennane, Karima Department of Physics, University of Fribourg, Switzerland
  • Kayser, Yves Department of Physics, University of Fribourg, Switzerland
  • Kavčič, Matjaz J. Stefan Institute, Ljubljana, Slovenia
  • Szlachetko, Jakub Department of Physics, University of Fribourg, Switzerland
  • Szlachetko, Monika Department of Physics, University of Fribourg, Switzerland
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    20.02.2009
Published in:
  • Physical Review Letters. - 2009, vol. 102, no. 7, p. 073006
English We report on the photon energy dependence of the K-shell double photoionization (DPI) of Mg, Al, and Si. The DPI cross sections were derived from high-resolution measurements of x-ray spectra following the radiative decay of the K-shell double vacancy states. Our data evince the relative importance of the final-state electron- electron interaction to the DPI. By comparing the double-to-single K-shell photoionization cross-section ratios for neutral atoms with convergent close-coupling calculations for He-like ions, the effect of outer shell electrons on the K-shell DPI process is assessed. Universal scaling of the DPI cross sections with the effective nuclear charge for neutral atoms is revealed.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/301163
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