Decay of the 4dhole states of Xe studied by photoelectron-photoelectron coincidence spectroscopy

The formation of ${\mathrm{Xe}}^{2+}$ by decay of 4d hole states in xenon has been investigated by observing both the ${\mathit{N}}_{4,5}$OO normal Auger spectra and the resonantly excited spectra using synchrotron radiation and a new form of electron–electron coincidence spectroscopy involving a magnetic-bottle time-of-flight analyzer. Direct double Auger processes from the resonance populate all accessible states of ${\mathrm{Xe}}^{2+}$ while indirect processes via superexcited ${\mathrm{Xe}}^{+}$ levels populate ground and lower excited states of ${\mathrm{Xe}}^{2+}$ preferentially.