Effects of spin–orbit activated interchannel coupling on dipole photoelectron angular distribution asymmetry parameters

Abstract

The effects of spin–orbit induced interchannel coupling on the dipole photoelectron angular asymmetry parameter β3d for Xe, Cs and Ba are explored using a modified version of the spin-polarized random phase approximation with exchange (SPRPAE) methodology. For Xe, is modified somewhat by the interchannel coupling in the vicinity of the 3d3/2 → ϵf shape resonance, and this effect is significantly more pronounced in Cs where the resonance is larger. In Ba, however, where f-wave orbital collapse has occurred, the shape resonance has moved below threshold and the effect of interchannel coupling on above the 3d3/2 threshold is negligible. But below the 3d3/2 threshold, is dominated by the huge broad 3d3/2 → 4f resonance.