High-resolution UV photoelectron spectrum of CO2

High resolution UV photoelectron spectroscopy of CO+2, COS+ and CS+2 using supersonic molecular beams

“…The derived ionization potentials and spectroscopic constants from this experiment are tabulated in Table 1 and Table 2 respectively. TheRenner-Teller effect has been discussed for CO2 + previously [19,36,41], and will not be belabored here. This effect is much weaker in COS and c4.…”

“…Much of this progress is credited to Dr. Kai Siegbahn and his group at Uppsala, for their introduction and application of the multiphannel detection technique to UV-valence photoelectron spectroscopy [9][10][11][12][13]. As a result of the improved resolution, such spectroscopic details as vibrational fine structure, vibronic interaction (Renner-Teller effect and John-Teller effect), and vibrational-vibrational interaction (Fermi resonance), etc., become possible for study in small polyatomic molecules [14][15][16][17][18][19].…”

“…In this paper, we use the molecules GO 2 , COS, and CS 2 to demonstrate the capabilities of the technique. The above-mentioned advantages are fully realized: the spin-orbit split components in all the II bands are completely resolved, and the inelastic scattering features in the R and bands of CO and CS [19,28,29] are completely removed.…”

“…The photoelectron spectra of CO 3 COS, and CS have been extensively studied since the beginning of the fie]d [30][31][32][33][34] and are still under study [19,28,29,[35][36][37][38][39][40][41][42][43]. The isoelectronic structures of the three molecules are ideal for observing any systematic changes.…”

“…Some vibrational assignments have also been controversial [34,39]. Pressure dependent studies have been conducted for CO and C4, and the inelastic scattering features in the R and bands have been confirmed [19,29].…”