M.L. Niu, E.J. Salumbides, A.N. Heays, N. De Oliveira, R.W. Field, W. Ubachs
The (2,0) (3,0) and (4,0) bands of the A1Π-X1Σ+ system of 12C16O have been re-investigated by high-resolution vacuum ultraviolet absorption spectroscopy. A vacuum ultraviolet Fourier-transform spectrometer, illuminated by synchrotron radiation, was applied to record a jet-cooled spectrum, a room temperature static gas spectrum and a high-temperature (900 K) quasi-static gas spectrum, resulting in absolute accuracies of 0.01-0.02 cm-1 for the rotational line frequencies. Precise laser-based data were included in the analysis allowing for a highly accurate determination of band origins. Rotational levels up to J = 52 were observed. The data were used to perform an improved analysis of the perturbations in the A1Π, v = 2, v = 3 and v = 4 levels by vibrational levels of the D1Δ, I1Σ-, e3Σ-, d3Δ and a′3Σ+ states. © 2015 Taylor and Francis.
Department of Physics and Astronomy, LaserLaB, Vrije Universiteit, Amsterdam, Netherlands; Department of Physics, University of San Carlos, Cebu City, Philippines; Leiden Observatory, Leiden University, Leiden, Netherlands; Synchrotron Soleil, Orme des Merisiers, GIF, sur Yvette Cedex, France; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, United States
