Study of vacancy decays in the L-shell photoionization of barium in the excitation energy range of 5.6-30 keV: from L-2 edge to energy high above the thresholds of double L-vacancy production

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Photoinduced Ba L x-rays were measured, in the excitation energy range of 5.6-30 keV, by using high-brilliance undulator radiation. The obtained intensity ratios, the excitation-energy independent L beta(4)/L beta(3), L eta/L beta(1), L iota/L alpha(1,2), L beta(6)/ L alpha(1,2) and L beta(2,15)/L alpha(1,2) as well as the excitation- energy dependent L beta(1)/L alpha(1,2), L beta(3)/L alpha(1,2) and L beta(3)/L beta(1), were compared with theoretical calculations, in which the calculations were performed by applying various subsets of the L subshell fluorescence yields and Coster-Kronig yields. Deviations of the theoretical calculations from the experimental results call on improvements in theory for the emission rates. We have also surveyed the L alpha(1,2) related x-ray hypersatellite lines in the photoinduced Ba L x-ray spectrum.


  • Y. Zou
  • M. Oura
  • Roger Hutton
  • H. Yamaoka
  • N. Takeshima
  • K. Takahiro
  • K. Kawatsura
  • T. Mukoyama
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Astronomy, Astrophysics and Cosmology
Original languageEnglish
Pages (from-to)4775-4788
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number22
Publication statusPublished - 2006
Publication categoryResearch