Rotational spectrum of the H216O molecule in the (010) excited vibrational state

Abstract

Five new MW lines of the pure rotational spectrum of water vapor in the (010) excited state have been measured. The analysis of the available data on the (010) vibrational state has been carried out using either a conventional model or a one-dimensional Borel approximation of a Watson-type Hamiltonian. In both cases a model with 24 parameters up to J8 was used. The use of the Borel-approximated Watson Hamiltonian resulted in a fit of the experimental data within experimental uncertainty, whereas the fit using the conventional model produced a standard deviation 60 times worse. © 1987.