High-resolution stimulated Raman spectroscopy and analysis of the ν₂ and ν₃ bands of C₂H₄

The high-resolution stimulated Raman spectra of the ν₂ and ν₃ bands of C₂H₄ have been recorded and analyzed separately by means of the tensorial formalism developed in Dijon and Reims for X₂Y₄ asymmetric-top molecules. For the ν₂ band, a total of 191 lines were assigned and fitted. We obtained a global root mean square deviation of 1.86 × 10^-3 cm^-1. For the ν₃ band analyzed in interaction with the ν₆ infrared band, a total of 185 lines were assigned and fitted. We obtained a global root mean square deviation of 1.29 × 10^-3 cm^{- 1}. Both analyses lead to very satisfactory synthetic spectra.