Single-photon double K-shell ionization of low-Z atoms
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Hoszowska, Joanna
Department of Physics, University of Fribourg, Switzerland
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Kheifets, A. S.
Research School of Physical Sciences, Australian National University, Canberra, Australia
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Dousse, Jean-Claude
Department of Physics, University of Fribourg, Switzerland
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Bray, Igor
ARC Centre for Matter-Antimatter Studies, Curtin University, Perth, Australia
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Cao, Wei
Department of Physics, University of Fribourg, Switzerland
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Fennane, Karima
Department of Physics, University of Fribourg, Switzerland
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Kayser, Yves
Department of Physics, University of Fribourg, Switzerland
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Kavčič, Matjaz
J. Stefan Institute, Ljubljana, Slovenia
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Szlachetko, Jakub
Department of Physics, University of Fribourg, Switzerland
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Szlachetko, Monika
Department of Physics, University of Fribourg, Switzerland
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Published in:
- Journal of Physics: Conference Series. - 2010, vol. 212, no. 1, p. 012006
English
The photon energy dependence of the double K-shell ionization of light atoms is reported. Experimental double-to-single photoionization cross section ratios for Mg, Al, Si and Ca were obtained from measurements of high-resolution x-ray emission spectra. The double photoionization (DPI) cross-sections for K-shell hollow atom production are compared to convergent close-coupling calculations (CCC) for neutral atoms and He-like ions. The relative importance of the initial-state and final-state electron-electron interactions to the K-shell DPI in many-electron atoms and two-electron ions is addressed. Physical mechanisms and scaling laws of the K-shell double photoionization are examined. A semiempirical universal scaling of the DPI cross sections with the effective nuclear charge for neutral atoms 2≤Z≤47 is established.
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Faculty
- Faculté des sciences et de médecine
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Department
- Département de Physique
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Language
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Classification
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Physics
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License
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License undefined
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Identifiers
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Persistent URL
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https://folia.unifr.ch/unifr/documents/301509
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