The coherent anti-Stokes Raman spectroscopy spectrum of the Q-branch of the ν1 band of hydrogen sulfide

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Abstract
The coherent anti-Stokes Raman spectroscopy (CARS) spectrum of the Q-branch of the ν1 band of natural H2S has been measured at a pressure of 1.3 kPa with continuous-wave excitation in the cavity of an argon-ion ring laser. For comparison with the experimental spectrum, Raman line positions and intensities were calculated from energy levels and wave functions that were previously obtained from the study of the pure rotation spectrum and the 2ν2, ν1, and ν3 bands by Fourier transform infrared spectroscopy. These Raman line positions and intensities formed the basis for the simulation of the theoretical CARS spectrum, which is in excellent agreement with the experimental one.

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