Format of Original
Journal of Molecular Spectroscopy
The CCN radical is a prototypical system for study of the Renner–Teller effect in its degenerate X ̃2Π ground state, with a number of experimental and theoretical studies carried out over the past 50 years. Most experimental studies have focused on the low-lying vibrational structure as observed in the high-resolution spectra of hot bands, or in emission. In this work, we have used pulsed-discharge supersonic-jet single vibronic level (SVL) emission spectroscopy from selected levels of the Ã2Δ state to probe the vibronic structure of X ̃2Π up to ∼6000 cm−1 above the vibrationless level. Around 50 levels were assigned, and these were fit to a Renner–Teller Hamiltonian to derive a detailed set of spectroscopic constants. Our data are compared with the results of recent high level coupled cluster calculations.
Muzangwa, Lloyd Godfrey and Reid, Scott, "Revisiting the Renner–Teller Effect in the X ̃2Π State of CCN: Pulsed Discharge-supersonic Jet Single Vibronic Level Emission Spectroscopy" (2015). Chemistry Faculty Research and Publications. 506.