Intrashell Electron Interaction Mediated Photoformation of Hollow Atoms near Threshold

Journal Article · Fri Jul 25 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.101.043001· OSTI ID:992123

Houtari, S; Kao, C; Hamalainen, K; Diamant, R; Sharon, R; Deutsch, M

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 Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: DOE - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 992123
• Report Number(s): BNL--94045-2010-JA; KC0401030
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
ELECTRON-ELECTRON INTERACTIONS
ELECTRONS
EMISSION SPECTROSCOPY
EXCITATION
K SHELL
PHOTOIONIZATION
PHOTONS
SYNCHROTRON RADIATION
TRANSITION ELEMENTS
national synchrotron light source