Abstract

Near-threshold photoionization of argon in the () inner-shell region has been studied by means of threshold photoelectron - photoion coincidence spectroscopy. The observed line profiles are clearly influenced by the post-collision interaction effect and this influence is observed to be stronger for double than for single-Auger decay. The spectra have been interpreted using a classical theory which takes into account the possibility that a single photoelectron can interact with several Auger electrons.

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