Tunable-Laser Spectroscopy of the ν1 Band of SO2

Abstract

Individual transitions of the ν₁ vibration‐rotation band of SO₂ in the 8.7‐μm‐wavelength region have been observed, using tunable semiconductor diode lasers, and compared with theoretical calculations based on pure‐rotation data from microwave absorption measurements. A new value of 1151.71 ± 0.01 cm⁻¹ has been found for the ν₁‐band center. Pressure‐broadening coefficients and intensities of individual lines were determined from the high‐resolution data, and a value was obtained for total band intensity.