High-resolution study of the nν2, n=1, 2, 3, vib-rotational bands of D2Se

High-resolution Fourier transform spectra of the (D2Se)-Se-M with M = 76, 77, 78, 80, and 82 in the regions of the first and second bending overtones 2 upsilon (2) and 3 upsilon (2) near 1480 and 2210 cm(-1), respectively, were recorded for the first time and assigned. On the basis of these experimental data, rotation-vibration enemies were determined and fitted together with those of the (010) state reported earlier (W. Jerembeck, H. Burger, J.-M. Flaud, and Ph. Areas. J. Mol. Spectrosc. 197, 215-221 (1999)) by using the "Global Fit" procedure. The obtained set of 43 fitted parameters for these three vibrational states of the (D2Se)-Se-80 species (altogether 86 fitted parameters for 12 states of five M species) reproduces the rotation-vibration energies of all studied states with accuracies close to experimental uncertainties. (C) 2000 Academic Press.