Abstract
Abstract Yield spectra of multiply charged ions have been measured by threshold electron-ion coincidence spectroscopy near the Xe L 1 -shell photoionization region. These spectra exhibit asymmetric and broadened profiles of post-collision interaction effects induced by multi-step Auger decays in Auger cascades following Xe L 1 -shell photoionization. The peak shifts of the profiles increase gradually along with the increase of the charge states, but the peak widths are almost independent of the charge states. The spectral profiles are reproduced by a simple model based on the assumption that double Auger (Auger shake-off) decays reduce the effective number of steps in the Auger cascades.
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