Analysis and theoretical modeling of the 18O enriched carbon dioxide spectrum by CRDS near 1.35 µm: (I) 16O12C18O, 16O12C17O, 12C16O2 and 13C16O2

The room temperature absorption spectrum of 18O enriched carbon dioxide has been recorded by very high-sensitivity Cavity Ring Down spectroscopy between 6977 and 7918 cm−1 (1.43−1.26 μm). The achieved sensitivity (noise equivalent absorption αmin ~8×10−11 cm−1) has allowed for the detection of more than 8600 lines belonging to 166 bands of eleven carbon dioxide isotopologues. Line intensities of the weakest observed transitions are on the order of 2×10−30 cm/molecule