Spin-orbit levels resolved in the decay ofO2by autoionization

Abstract
A technique of two-dimensional photoelectron spectroscopy has been applied 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 exaplined in terms of a model in which the orbital angular momentum along the internuclear axis of the positive ion core remains unchanged during the autoionization process.