Universal scaling of the M- and N-shell ionization probabilities measured in collisions of O, Si and S ions with heavy atoms

D. Banaś, J. Braziewicz, U. Majewska, M. Pajek, J. Semaniak, T. Czyzewski, M. Jaskóła, W. Kretschmer, T. Mukoyama, D. Trautmann

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Abstract

Multiple ionization in outer M- and N-shells in Ta, Os, Au, Bi, Th and U targets was studied for O, Si and S ion impact at energies of 0.3-2.2 MeV amu-1. Excited Lγ(L-N, O) x-rays measured with a semiconductor Si(Li) detector were resolved by using a newly developed method accounting for simultaneous x-ray energy shift and line broadening due to the multiple ionization. The measured ionization probabilities, corrected for the effect of the vacancy rearrangement up to the moment of L x-ray emission, are interpreted as the ionization probabilities for M- and N-shells for the zero impact parameter. The ionization probabilities for the N-shell are found to be substantially increased by the super-Coster-Kronig transitions. Derived ionization probabilities for M- and N-shells are compared with the predictions of the geometrical model (GM) and the semiclassical (SCA) calculations in the united-atom limit. The universal scaling of the measured ionization probabilities for the M- and N-shells is discussed within the GM and SCA approaches.

Original languageEnglish
Pages (from-to)L793-L800
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume33
Issue number21
DOIs
Publication statusPublished - Nov 1 2000

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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    Banaś, D., Braziewicz, J., Majewska, U., Pajek, M., Semaniak, J., Czyzewski, T., Jaskóła, M., Kretschmer, W., Mukoyama, T., & Trautmann, D. (2000). Universal scaling of the M- and N-shell ionization probabilities measured in collisions of O, Si and S ions with heavy atoms. Journal of Physics B: Atomic, Molecular and Optical Physics, 33(21), L793-L800. https://doi.org/10.1088/0953-4075/33/21/101