Symmetry-Resolved Vibrational Spectra of Carbon<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>K</mml:mi></mml:math>-Shell Photoelectron Satellites in Carbon Monoxides: Experiment and Theory

Abstract

We have carried out angle-resolved measurement for the C $1s$ photoelectron shakeup satellites of gaseous CO molecules, at unprecedented energy resolution, and resolved the vibrational structures for one $^{2}\ensuremath{\Sigma}^{+}$ and two $^{2}\ensuremath{\Pi}$ bands. The present ab initio calculations for the potential curves of these shakeup satellite states and the relevant Franck-Condon analysis well reproduce the vibrational structures of these bands and confirm the assignments.