Abstract
High-resolution spectra of NH3, yielding 1800 lines between 3060–3580 cm−1, are presented. Analysis of the ν3 fundamental is complete through J′=9 and presents no unexpected features. Resolution of the K substructure in the ν1 fundamental shows that several perturbations are present. The most important of these, involving a Fermi resonance with the parallel component of 2ν4, and a Coriolis resonance with its perpendicular component, are clarified. Lines in both components of 2ν4 are identified through J′=6, and a strong Coriolis interaction between the l=0 and l=2 states is observed and discussed.
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