High-Resolution Fourier Transform Spectrum of D2O in the Region Near 0.97 μm

The high-resolution Fourier transform spectrum of the D2O molecule were recorded and analyzed in the region near 0.97 μm (10 200–10 440 cm−1) where the bands of the v=4 (v=v1+v2/2+v3) polyad are located. Transitions belonging to the strongest band of the polyad, 3ν1+ν3, are assigned up to the value of the rotational angular momentum quantum number J=13. The presence of strong local resonance interactions allowed us to assign some transitions to the very weak band 4ν1. Upper states energies obtained on that basis were fitted with a Hamiltonian model which took into account resonance interactions between the states of the v=4 polyad. The derived spectroscopic parameters reproduce the overwhelming majority of assigned transitions within experimental accuracy.