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Title: Analysis of the spectra of isotopically substituted water vapour
Author: Tanaka, Mizuho
ISNI:       0000 0001 3498 0228
Awarding Body: UCL (University College London)
Current Institution: University College London (University of London)
Date of Award: 2005
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The spectrum of water vapour is widely studied due to its significance in many areas of science. Isotopically substituted water vapour such as H 217O and H218O are known to contribute significantly to the absorption of solar radiation in the Earth's atmosphere, yet they have been less extensively studied. Recent advances in the variational nuclear motion calculations, high quality potential energy surfaces (PES) and dipole moment surfaces (DMS) allow us to accurately calculate the energy levels and spectra of water vapour. Using the DVR3D program suite developed at UCL, the energy levels of D2O have been calculated in order to analyse the spectrum by the D2O laser. The calculated band origins of D2O is given in this thesis. New linelists for H2 17O and H218O are also generated using the DVR program suite. Using these linelists, several experimental spectra of isotopically substituted water vapour have been studied. We analysed the H 217O and H218O spectra measured by Fourier transform spectrometer at Kitt Peak National Solar Observatory (AZ, USA). Both spectra lie m 3+ and 4 polyad region where currently no data is publicly available. We also analysed the the H217O and H218O spectra in 5? polyad region recorded by cavity ring-down spectroscopy at the Vrije Universiteit (Amsterdam, the Netherlands). The wavenumber region analysed in this work is the highest to date for both water isotopologues. The results of analyses are presented in this thesis.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available