Fourier transform and CARS spectroscopy of the ν1 and ν3 fundamental bands of 14NH3

Abstract The ν 1 and ν 3 fundamental bands of 14 NH 3 have been measured using the techniques of Fourier transform and coherent anti-Stokes Raman spectroscopy. The effective values of the band origins, rotational and centrifugal distortion constants, and parameters of the vibrational-rotational interactions have been obtained by analyzing these bands as essentially regular parallel and perpendicular bands, with the “off-diagonal” local resonance interactions excluded from the fit. The “diagonal” l -type resonance effects have been included into the analysis of the ν 3 band for the + l , K = 1 and − l , K = 2 levels.