Photoelectron studies of the resonant excitation and ionization of the Kr 3d inner subshell in the low kinetic energy region

Photoexcitation of the Kr 3d to np resonances and photoionization of the 3d inner shell have been studied by measuring the emitted electrons with energies from 0 to 3 eV and from 0 to 12 eV, respectively. Intense discrete structure due to the Kr+ to Kr2+ transitions has been observed in photoelectron spectra. Assignments are proposed based on the spectator shake model and by analysis of effective quantum numbers of proposed Kr+ states. The observed energy shift and asymmetric line broadening, related to the post-collision interaction, of the Kr+ 3d-1(2D512.3) ionic states have been compared with previous experimental results and with theoretical predictions.