SPIN-ORBIT LEVELS RESOLVED IN THE DECAY OF O-2 BY AUTOIONIZATION

A technique of two-dimensional photoelectron spectroscopy has been app lied for measuring spin-orbit decay routes of the H, I, I', I'', and J autoionization states to the two spin-orbit components of the ground state of molecular oxygen. Strong selectivity of the spin-orbit decay routes was found. The observed selectivity is explained in terms of a model in which the orbital angular momentum along the internuclear axi s of the positive ion core remains unchanged during the autoionization process.