Adsorbate Orientation Using Angel-Resolved Polarization-Dependent Photoemission

Abstract

Angle-resolved photoemission, using polarized synchrotron radiation, from the system Ni(001) +CO shows two chemisorption peaks which exhibit strong variations in amplitude depending on polar angle of emission and optical polarization. The behavior is in agreement with a recent calculation of angular photoemission from oriented CO molecules, supporting the model of undissociated, "end-on" bonding with the molecular axis perpendicular to the surface, and thus demonstrates that angle-resolved photoemission may give adsorbate goemetries.