Refinement in the analysis of molecular Auger electron spectra: The 2p-1->3p-2 spectra of HCl and DCl

High-resolution Cl 2p-1 photoelectron (PES) and Cl 2p-1->3p?-2 normal Auger electron spectra (AES) have been measured using different photon energies. The PES and AES have been fitted simultaneously taking vibrational and electronic lifetime-interference terms into account. Detailed results are presented for the Cl 2p-1->3p?-2 normal Auger transitions. The equilibrium distances, vibrational energies, and anharmonicities for the 1?+, 1?, and 3?- final states are derived from the intensity distribution of the vibrational substates. The relative intensities for the different Cl 2p-1->3p?-2 normal Auger transitions are also given. In addition to the Cl 2p-1->3p?-2 transitions, some fine structures are observed that show a photon energy dependence. These structures are assigned to decays of doubly excited or shake-up/off states.