AUTOIONIZATION OF THE AR, K AND CA 2P54S, 3D-RESONANCES - VALIDITY OF THE SPECTATOR MODEL

The photoelectron spectra emitted upon the decay of the core resonances 2p → 4s and 2p → 3d have been studied experimentally for atomic Ar, K and Ca and compared with configuration interaction HF calculations. The main decay channel for the 2p-hole state, in case of resonant excitation of the 2p-electron to an outer shell and in case of ionization of the 2p-electron into the continuum, leads to a final state with two vacancies in the 3p-shell. The spectator model, which predicts a similarity between the spectra following the decay of the ion and of the resonant state, is valid except for small deviations for the 2p → 4s resonances, whereas for all 2p → 3d resonances it breaks down completely. © 1990.