Photoion–Auger-electron Coincidence Measurements Near Threshold
Nuclear Instruments and Methods
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The vacancy cascade which fills an atomic inner-shell hole is a complex process which can proceed by a variety of paths, often resulting in a broad distribution of photoion charge states. We have measured simplified argon photoion charge distributions by requiring a coincidence with a K-LL or K-LM Auger electron, following K excitation with synchrotron radiation, as a function of photon energy, and report here in detail the argon charge distributions coincident with K-L1L23 Auger electrons. The distributions exhibit a much more pronounced photon-energy dependence than do the more complicated non-coincident spectra. Resonant excitation of the K electron to np levels, shakeoff of these np electrons by subsequent decay processes, double-Auger decay, and recapture of the K photoelectron through postcollision interaction occur with significant probability.
Argon; Atomic orbitals; Auger effect; Electron configuration; Electronic excitation; Gases; Rare; Photoelectrons; Photoionization
Analytical Chemistry | Atomic, Molecular and Optical Physics | Biological and Chemical Physics | Elementary Particles and Fields and String Theory | Physical Chemistry
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Levin, J. C.,
Short, R. T.,
Sellin, I. A.,
Lindle, D. W.
Photoion–Auger-electron Coincidence Measurements Near Threshold.
Nuclear Instruments and Methods, B56-57(Part 1),