Submillimeter Spectroscopy of the Major Isotopes of Water

Extensive new measurements in the region 300-1100 GHz for the major isotopes of water in both the ground and first excited vibrational states are reported. These results are used as the basis for centrifugal distortion analyses of these species that are based solely upon microwave data. Comparisons are made with both earlier microwave work and with previous analyses based upon weighted data sets of microwave and high-resolution infrared data. The new measurements reported in this paper represent more than a third of the total microwave data currently available. (Author).