Importance of Spin-Orbit Effects in Parity-Unfavored Photoionization of Neon, Observed Using a Two-Dimensional Photoelectron Imaging Technique

Abstract

We present an experimental and theoretical study of photoexcitation and decay mechanisms of doubly excited resonances in neon. New spin-orbit induced effects are identified in the angle-resolved and photoelectron-resolved differential cross sections for a parity-unfavored transition. These observations are facilitated using a two-dimensional imaging technique, and highlight the importance of considering spin-orbit induced effects when studying detailed spectra in atomic systems as light as neon. {copyright} {ital 1998} {ital The American Physical Society}