HDO and D(sub 2)O Low Pressure, Long Path Spectra in the 600 to 3100cm Region. I. HDO Line Positions and Strength

Abstract High-resolution spectra of gas mixtures of HDO, D 2 O, and H 2 O were obtained with a Fourier-transform spectrometer with path lengths up to 433 m. The spectra were analyzed to obtain line positions and strengths of over 6000 transitions of HDO and D 2 O. For HDO, these included the (000)–(000), (020)–(010), and (100)–(010) bands of HD 16 O and the (010)–(000) bands of HD 16 O, HD 17 O, and HD 18 O. Several of these assignments are reported for the first time. Of interest was the extended coverage of the A -type transitions of the (010)–(000) band of HD 16 O. This is the only A -type infrared band of any of the water vapor species (HDO, D 2 O, and H 2 O) that is not involved in interactions with other bands. By this token, the A -type dipole-moment expansion matrix elements can be tested without involving perturbation theory. The measured linestrengths of the interacting bands, (020)–(010) and (100)–(010), were analyzed using a full perturbation treatment. Strong localized Coriolis interactions affected only a few observed transitions.

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