Multiphoton ionization photoelectron spectroscopy study of OCS: Rydberg vibronic structure and ion state selection

Abstract

Multiphoton ionization (MPI) in conjunction with photoelectron spectroscopy (PES) has been used to examine Rydberg states of OCS in the energy range from 70 547 to 75 472 cm−1. The combination of techniques allows us to correct previous assignments for several vibronic bands, and to probe vibronic mixing in the Rydberg levels. In the course of this study we have found routes for preparing OCS+ with control over both vibrational mode and fine structure state.