Journal article

Double K-shell ionization of Al induced by photon and electron impact

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  • Physical Review A. - 2009, vol. 79, no. 3, p. 032708
English This paper reports on the investigation of the double K-shell ionization of metallic aluminum induced by photon and electron impact. The experimental method consisted to measure the Kα hypersatellite spectra resulting from the radiative decay of double 1s vacancy states by means of high-resolution x-ray spectroscopy using a Bragg-type von Hamos crystal spectrometer. Measurements of the photon-induced spectra were carried out at the European Synchrotron Radiation Facility, Grenoble, France, while those of the electron-induced spectra were performed at the University of Fribourg. The double 1s ionization probabilities and cross sections were derived from the Kα₂ hypersatellite to diagram line intensity ratios for photon beam energies ranging between 3.1 and 5.5 keV and for different incident electron-beam energies ranging between 4 and 20 keV. The energy and linewidth of the Kα₂ hypersatellite x-ray line were also determined for which consistent results were obtained from the photon and electron-beam measurements.
Faculté des sciences et de médecine
Département de Physique
  • English
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