MICROWAVE SPECTRUM OF WATER
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Date
1971
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Publisher
Ohio State University
Abstract
About a hundred new lines belonging to the microwave spectrum of the nine stable isotopic species of water have been measured between 8 and 340 GHz. Watson’s reduced Hamiltonian has proved appropriate for analyzing and fitting the spectrum, deriving meaningful rotational constants, and calculating tables of energy levels. The terms in the Hamiltonian have been chosen by considering their independence and relative contribution with respect to the available data. Possible models have then been checked by a statistical analysis. For the isotopic species $H_{2}O^{x}$ (x = 16, 17, 18), the new lines are 67 803.62 ($H_{2}O^{16}$, ${v_{2}})$, 13 535.46 and 194 002.31 ($HO^{17}$, reduced frequency) and 203 407.29 MHz ($H_{2}O^{18}$). In analyzing the corresponding spectra, the microwave and infrared data have been used simultaneously. For the $HDO^{x}$ $D_{2}O^{x}$ species, only the microwave spectrum was retained and a more or less complete analysis was obtained for $HDO^{16}$, $HDO^{17}$, $HDO^{18}$ and $D_{2}O^{16}$.
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Author Institution: University of Louvain; University of Lille