Journal article

K-shell double photoionization of Be, Mg, and Ca

  • Kheifets, A. S. Research School of Physical Sciences, The Australian National University, Canberra, Australia
  • Bray, Igor ARC Centre for Matter-Antimatter Studies, Curtin University, Perth, Australia
  • Hoszowska, Joanna Department of Physics, University of Fribourg, Switzerland
Published in:
  • Physical Review A. - 2009, vol. 79, no. 4, p. 042504
English We perform convergent close-coupling calculations of double photoionization (DPI) of the K-shell of alkaline-earth metal atoms (Be, Mg, and Ca) from the threshold to the nonrelativistic limit of infinite photon energy. Theoretical double-to-single photoionization cross-section ratios for Mg and Ca are compared with experimental values derived from high-resolution x-ray spectra following the radiative decay of the K-shell double vacancy. We investigate the role of many-electron correlations in the ground and doubly-ionized final states played in the DPI process. Universal scaling of DPI cross section with an effective nuclear charge is examined in neutral atoms in comparison with corresponding heliumlike ions.
Faculté des sciences et de médecine
Département de Physique
  • English
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