Spectroscopy and perturbation analysis of the A¹π (v=0) state of ¹³ C¹⁶ O

The lowest v = 0 level of the A1Π state of the 13C16O isotopologue of carbon monoxide has been reinvestigated with a variety of high-resolution spectroscopic techniques. The A1Π −X1Σ+(0, 0) band has been studied by vacuum-ultraviolet Fourier-transform absorption spectroscopy, using the SOLEIL synchrotron as a radiation source. Spectra were obtained under quasi-static gas conditions at liquid-nitrogen temperature, room temperature and at an...