Physical mechanisms and scaling laws of K-shell double photoionization.
- Hoszowska J Department of Physics, University of Fribourg, CH-1700 Fribourg, Switzerland.
- Kheifets AK
- Dousse JC
- Berset M
- Bray I
- Cao W
- Fennane K
- Kayser Y
- Kavcic M
- Szlachetko J
- Szlachetko M
- 2009-03-05
Published in:
- Physical review letters. - 2009
English
We report on the photon energy dependence of the K-shell double photoionization (DPI) of Mg, Al, and Si. The DPI cross sections were derived from high-resolution measurements of x-ray spectra following the radiative decay of the K-shell double vacancy states. Our data evince the relative importance of the final-state electron-electron interaction to the DPI. By comparing the double-to-single K-shell photoionization cross-section ratios for neutral atoms with convergent close-coupling calculations for He-like ions, the effect of outer shell electrons on the K-shell DPI process is assessed. Universal scaling of the DPI cross sections with the effective nuclear charge for neutral atoms is revealed.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.102.073006
- PMID 19257666
- Persistent URL
- https://sonar.rero.ch/global/documents/288951
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