Spectral intensities of the 4-μm ν1 + ν3 combination band of SO 2

Abstract

The transition intensities of the 4-μm bands of SO 2 are measured with high precision using a tunable laser difference-frequency spectrometer. The band strength calculated from the ν 1 + ν 3 combination band data at 295.2K is S v 0 = 10.54 ± 0.04 cm −2 atm −1. Here the uncertainty (three standard deviations) quoted is for the relative precision only; the absolute accuracy, which depends on the sample pressure calibration, is ∼1%. F-factors and “hot” band results are also obtained.