Emission spectrum of CO2 in the 9.6 μm region

Abstract The emission spectrum of 12 C 16 O 2 in the 9.6 μm region has been observed with a high resolution spectrometer. The 00 0 -02 0 0 transition appears with a high intensity. Some additional transitions have also been observed and effective rotational constants for the corresponding bands have been calculated. Because of the overlapping of some “hot” lines with the principal ones, care has to be taken in using the 00 0 1–02 0 0 transition as reference for calibration of high resolution spectra.