Double K-shell photoionization and hypersatellite x-ray transitions of 12⩽Z⩽23 atoms
-
Hoszowska, Joanna
Department of Physics, University of Fribourg, Fribourg, Switzerland
-
Dousse, Jean-Claude
Department of Physics, University of Fribourg, Fribourg, Switzerland
-
Cao, Wei
Department of Physics, University of Fribourg, Fribourg, Switzerland
-
Fennane, Karima
Department of Physics, University of Fribourg, Fribourg, Switzerland
-
Kayser, Yves
Department of Physics, University of Fribourg, Fribourg, Switzerland
-
Szlachetko, Monika
Department of Physics, University of Fribourg, Fribourg, Switzerland
-
Szlachetko, Jakub
European Synchrotron Radiation Facility (ESRF),Grenoble, France
-
Kavčič, Matjaz
J. Stefan Institute, Ljubljana, Slovenia
Show more…
Published in:
- Physical Review A. - 2010, vol. 82, no. 6, p. 063408
English
Single-photon double K-shell ionization of low-Z neutral atoms in the range 12⩽Z⩽23 is investigated. The experimental method was based on measurements of the high- resolution Kαh hypersatellite x-ray spectra following the radiative decay of the K-shell double-vacancy states excited by monochromatic synchrotron radiation. The photon energy dependence of the double K-shell ionization was measured over a wide range of photon energies from threshold up to and beyond the maximum of the double-to- single photoionization cross section ratios. From the high-resolution x-ray emission spectra the energies and linewidths of the hypersatellite transitions, as well as the Kαh1:Kαh2 intensity ratios, were determined. The relative importance of the initial-state and final-state electron-electron interactions to the K-shell double photoionization is addressed. Physical mechanisms and scaling laws of the K-shell double photoionization are examined. A semiempirical universal scaling of the double- photoionization cross sections with the effective nuclear charge for neutral atoms in the range 2⩽Z⩽47 is established.
-
Faculty
- Faculté des sciences et de médecine
-
Department
- Département de Physique
-
Language
-
-
Classification
-
Physics
-
License
-
License undefined
-
Identifiers
-
-
Persistent URL
-
https://folia.unifr.ch/unifr/documents/305070
Statistics
Document views: 47
File downloads: