title: Frequency Measurement of Pure Rotational Transitions of H217O and H218O from 0.5 to 5 THz.
abstract: Frequencies of pure rotational transitions of isotopic species of water, H217O, and H218O were measured in the 1-5 THz region with a high-precision far-infrared spectrometer using a tunable radiation source. Measured frequencies of more than 100 spectral lines for each species provide an excellent frequency standard for the far-infrared region. Molecular parameters based on a Watson-type Hamiltonian have been obtained to reproduce the observed frequencies. Copyright 1999 Academic Press.
authors.affiliation: Department of Physics, Toyama University, Gofuku, Toyama, 930, Japan
authors.initials: F
authors.lastname: Matsushima
authors.initials: H
authors.lastname: Nagase
authors.initials: T
authors.lastname: Nakauchi
authors.initials: H
authors.lastname: Odashima
authors.initials: K
authors.lastname: Takagi