Partial cross sections and photoelectron angular distributions in the region of the 4s→5pand 5s→6presonances in krypton and xenon

Using synchrotron radiation and photoelectron spectrometry, we have examined the 4s4p⁶5p resonance region in krypton and the 5s5p⁶6p resonance region in xenon. We have obtained partial and total cross sections, intensity ratios, and photoelectron angular distribution parameters for the energy regions 20.6--21.5 eV in xenon and 24.6--25.3 eV in krypton. We also report Shore parameters for all cross-section data taken. In addition to the anticipated single-electron transition, we clearly resolve features attributable to two-electron transitions in both species. Characteristics of these autoionizing states may differ considerably in the two available exit channels.