Recent progress in the study of photoionization processes of atomic species by electron spectroscopy using synchrotron radiation

Abstract

The use of the synchrotron radiation emitted by the ACO storage ring has recently produced new significant results in the study of single and multiple photoionization processes in atoms. With photon flux in the 10 10-10 11 photons/sec in 1 % band width between 30 and 110 eV, we have been able to investigate photoionization processes with cross sections as low as 0.01 megabarn. It has thus been possible to study the correlation satellites in helium, argon and xenon, to determine subshell photoionization cross sections, including the variation of branching ratios due to the spin-orbit splitting, to produce photoemission spectra of metallic vapors and to observe threshold effects, like the post collision interaction.