Journal article

Single-photon double K-shell ionization of low-Z atoms

  • Hoszowska, Joanna Department of Physics, University of Fribourg, Switzerland
  • Kheifets, A. S. Research School of Physical Sciences, Australian National University, Canberra, Australia
  • Dousse, Jean-Claude Department of Physics, University of Fribourg, Switzerland
  • Bray, Igor 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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    2010
Published in:
  • Journal of Physics: Conference Series. - 2010, vol. 212, no. 1, p. 012006
English The photon energy dependence of the double K-shell ionization of light atoms is reported. Experimental double-to-single photoionization cross section ratios for Mg, Al, Si and Ca were obtained from measurements of high-resolution x-ray emission spectra. The double photoionization (DPI) cross-sections for K-shell hollow atom production are compared to convergent close-coupling calculations (CCC) for neutral atoms and He-like ions. The relative importance of the initial-state and final-state electron-electron interactions to the K-shell DPI in many-electron atoms and two-electron ions is addressed. Physical mechanisms and scaling laws of the K-shell double photoionization are examined. A semiempirical universal scaling of the DPI cross sections with the effective nuclear charge for neutral atoms 2≤Z≤47 is established.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/301509
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