Single-photon double K-shell ionization of low-Z atoms
- Hoszowska, Joanna Department of Physics, University of Fribourg, Switzerland
- Kheifets, A. S. Research School of Physical Sciences, Australian National University, Canberra, Australia
- Dousse, Jean-Claude Department of Physics, University of Fribourg, Switzerland
- Bray, Igor ARC Centre for Matter-Antimatter Studies, Curtin University, Perth, Australia
- Cao, Wei Department of Physics, University of Fribourg, Switzerland
- Fennane, Karima Department of Physics, University of Fribourg, Switzerland
- Kayser, Yves Department of Physics, University of Fribourg, Switzerland
- Kavčič, Matjaz J. Stefan Institute, Ljubljana, Slovenia
- Szlachetko, Jakub Department of Physics, University of Fribourg, Switzerland
- Szlachetko, Monika Department of Physics, University of Fribourg, Switzerland
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2010
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.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 18129
- DOI 10.1088/1742-6596/212/1/012006
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301509
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