Single-photon multiple ionization of argon in theK-edge region
- 1 April 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 51 (4) , 2939-2944
- https://doi.org/10.1103/physreva.51.2939
Abstract
The individual charge state and total ion yields resulting from the photoionization of argon gas have been measured as a function of photon energy through the K edge using synchrotron radiation and time-of-flight spectroscopy. We have formulated a model for the mean ion charge q¯(hν) observed at nominal photon energy hν, and have determined the mean ion charge q¯ resulting from the decay of the atom following [1s]4p, [1s]5p, and [1s]ɛp photoabsorption. We have also characterized the energy-dependent photoelectron recapture probability due to postcollision interaction. In contrast with the recent analysis by Doppelfeld et al. [J. Phys. B 26, 445 (1993)], we find that the gradual increase in q¯(hν) that begins approximately 20 eV below the argon K edge can be attributed to lifetime energy broadening of the K-hole state and the finite energy width of the x-ray source.Keywords
This publication has 15 references indexed in Scilit:
- Post-collision interaction effects of photoelectrons induced by Auger cascadesJournal of Physics B: Atomic, Molecular and Optical Physics, 1994
- On the mechanism of the smooth increase of the mean ion charge in Ar photoionization near the K-edgePhysics Letters A, 1993
- A close look at Ar photoion spectra around the K edge: non-diagram transitions and double photoionizationJournal of Physics B: Atomic, Molecular and Optical Physics, 1993
- Threshold behaviour of the multiply-charged photoion yields near the Ar K edgeJournal of Physics B: Atomic, Molecular and Optical Physics, 1991
- Argon-photoion–Auger-electron coincidence measurements followingK-shell excitation by synchrotron radiationPhysical Review Letters, 1990
- Quantum approach to photoelectron recapture in post-collision interactionPhysical Review A, 1990
- Photoelectron recapture through post-collision interactionPhysical Review A, 1988
- Multiple photoionisation in the rare gases from threshold to 280 eVJournal of Physics B: Atomic and Molecular Physics, 1979
- Atomic Readjustment to Vacancies in theandShells of ArgonPhysical Review B, 1965
- Time-of-Flight Mass Spectrometer with Improved ResolutionReview of Scientific Instruments, 1955