The temperature dependence of the intensities of the Q-branches in the Raman spectrum of gaseous CO<sub>2</sub> in the Fermi resonance region was measured in the range from 300 K to 650 K. The intensity contours were reproduced by computer simulation, taking into account energy levels up to (<i>v</i><sub>1</sub><i>v</i><sub>2</sub><sup>1</sup><i>v</i><sub>3</sub>) = (30°0) as final states. Calibration curves are given for the determination of temperatures from the intensity distribution in the hot bands of the Raman spectrum of CO<sub>2</sub>.
P. Wienecke, H. Finsterhölzl, H. W. Schrötter, and J. Brandmüller, "Raman Spectra of Carbon Dioxide and Its Isotopic Variants in the Fermi Resonance Region. Part IV: Temperature Dependence on Q-Branch Intensities from 300 K to 650 K," Appl. Spectrosc. 40, 70-76 (1986)