LETTER TO THE EDITOR: Observation of ? and ? inner-shell doubly excited states

Abstract

The photoabsorption spectra of neon and argon in the energy region of the and doubly excited states have been studied. The resolution and flux of the new VUV undulator beam line at ELETTRA allowed the resolution of new features for Ne and the first observation for Ar. A comparison of the measured photoabsorption spectra and of the threshold photoelectron spectra in the energy region of the and satellite states provides information on the decay routes of the inner-shell doubly excited states.