Molecular-Frame Angular Distributions of Resonant CO:C(1s) Auger Electrons

The molecular-frame angular distributions of resonantly excited CO:C(1s)->pi(*) Auger electrons were determined using angle-resolved electron-ion coincidence spectroscopy in combination with a novel transformation procedure. Our new methodology yields full three-dimensional electron angular distributions with high energy resolution from the measurement of electrons at only two angles. The experimentally determined distributions are well reproduced by calculations performed in a simple one-center approximation, allowing an unambiguous identification of several overlapping Auger lines.