Study of the H2O dipole moment and polarisability vibrational dependence by the analysis of rovibrational line shifts.
The study of the H2O dipole moment μ and polarisability α vibrational dependence is based on the comparison of experimental and calculated line shifts induced by argon, nitrogen, and air pressure in different H2O vibrational bands. Obtained dependence α on the stretching vibrations is in good agreement with the existing ab initio calculations in the literature, but the dependence α on the bending vibration is quite different. To clarify the dependence of μ and α on the bending vibration, the shifts of selected H2O lines of the 4ν2, 5ν2, and 6ν2 bands induced by argon, hydrogen and helium pressure are measured with the help of a Bruker IFS HR 125 spectrometer at room temperature with a spectral resolution of 0.01 cm-1. The comparison of experimental and calculated results with different values of μ and α line shifts is given.
['Starikov|V I|VI|', 'Petrova|T M|TM|', 'Solodov|A M|AM|', 'Solodov|A A|AA|', 'Deichuli|V M|VM|']
Dipole moment and polarisability Line shift Water