Intrashell Electron Interaction Mediated Photoformation of Hollow Atoms near Threshold
Journal Article
·
· Physical Review Letters
Double photoionization (DPI) of an atom by a single photon is a direct consequence of electron-electron interactions within the atom. We have measured the evolution of the K-shell DPI from threshold up in transition metals by high-resolution x-ray emission spectroscopy of the K{sup h}a hypersatellites, photoexcited by monochromatized synchrotron radiation. The measured evolution of the single-to-double photoionization cross-section ratio with excitation energy was found to be universal. Theoretical fits suggest that near threshold DPI is predominantly a semiclassical knockout effect, rather than the purely quantum-mechanical shake-off observed at the infinite photon energy limit.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
- Sponsoring Organization:
- DOE - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 992123
- Report Number(s):
- BNL-94045-2010-JA; PRLTAO; R&D Project: LS001; KC0401030; TRN: US1007683
- Journal Information:
- Physical Review Letters, Vol. 101, Issue 4; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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