M.L. Niu, E.J. Salumbides, D. Zhao, N. De Oliveira, D. Joyeux, L. Nahon, R.W. Field, W. Ubachs
The two lowest-νv′ (0,0) and (1,0) bands of the A1Π -X1Π+ system of 12C16O have been investigated by two high-resolution spectroscopic methods. A vacuum ultraviolet Fourier-transform spectrometer, illuminated by synchrotron radiation, was applied to record a jet-cooled spectrum and a room temperature static gas spectrum, resulting in absolute accuracies of 0.01-0.02 cm-1. In addition two-photon Doppler-free laser spectroscopy has been applied to a limited number of rotational lines, resulting in an accuracy of 0.002 cm -1. The data were used to perform an improved analysis of the perturbations in the A1Π, ν = 0 and ν = 1 levels by vibrational levels in the D1Δ, I1Σ -, e3Σ-, d3Δ. and a′3Σ+ states. © 2013 Taylor & Francis.
Department of Physics and Astronomy, LaserLaB, VU University, 1081 HV Amsterdam, De Boelelaan 1081, Netherlands; Department of Physics, University of San Carlos, Cebu City 6000, Philippines; Synchrotron Soleil, Orme des Merisiers, 91192, GIF sur Yvette Cedex, St. Aubin BP 48, France; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
