Carbon K-shell photoelectron angular distribution from fixed-in-space CO₂molecules

Abstract

Measurements of photoelectron angular distributions for carbon K-shell ionization of fixed-in-space CO 2 molecules with the molecular axis oriented along, perpendicular and at 45 to the electric vector of the light are reported. The major features of these measured spectra are fairly well reproduced by calculations employing a relaxed-core Hartree-Fock approach. In contrast to the angular distribution for K-shell ionization of N 2 , which exhibits a rich structure dominated by the f-wave (l = 3) at the shape resonance, the angular distribution for carbon K-shell photoionization of CO 2 is quite unstructured over the entire observed range across the shape resonance.