Characteristics of correlation satellites below 25 eV in xenon probed by pulsed-field-ionization-zero-kinetic-energy photoelectron spectroscopy

The technique of pulsed-field-ionization-zero-kinetic-energy photoelectron spectroscopy, typically applied to the investigation of ionic states of ato ms and molecules resulting from single electron excitation, has been used t o probe all known correlation ionic states of xenon up to 25 eV. The high-r esolution (1 meV) spectra that result show the formation of satellite state s clearly resolved from their neighbors. Their intensities are com parable to that of the 5s5p(6 2)S(1/2) main line ionic state and for a given multip let are relatively independent of the total angular momentum of the ionic s tate formed. The Rydberg states converging onto different ionic limits demo nstrate effective lifetimes that are related to the excitation of the assoc iated ionic core. These spectra allow the determination of relative intensi ties, and from them, the partial cross sections for the formation of each s tate at threshold. This supplements the existing intensity studies from the near-threshold to the x-ray region and increases our understanding of the dominant correlation processes within this atom as a function of photon ene rgy. [S1050-2947(99)04804-0].