16O12C17O and 18O12C17O spectroscopy in the 1.2–1.25 μm region

Near-infrared absorption spectra of a carbon dioxide sample enriched with oxygen-17 were recorded in the spectral range 1.2–1.25 μm. A high-resolution continuous scan Fourier transform interferometer fitted with a femto OPO/Idler laser source and cavity-enhanced absorption was used. The optimal root mean squared noise equivalent absorption was 1.2 × 10−10 cm−1Hz–1/2 per spectral element, corresponding to αmin = 10−8 cm−1. Two cold bands in 17O12C18O and one hot band in 16O12C17O were newly identified and rotationally analyzed. More lines than previously published (Lyulin et al. J. Quant. Spectrosc. Radiat. Transfer, 113, 2167 (2012)), were assigned in the observed bands of 12C17O2 and 16O12C17O. New upper state rotational constants were obtained from a band-by-band analysis.