Interferometric determination of the dispersion of vibrational polarizability and the integrated intensities of fundamental bands of 32,34SF6 and NF3 molecules

The refractivity of gaseous SF6 and NH3 in the region of the intense absorption bands of these compounds was measured by two-beam, two-color interferometry using a He-Ne laser and a CO2 laser tunable throughout its emission lines. Quantitative data on the profiles of the absorption bands of these gases were also obtained by IR Fourier spectroscopy. By using the joint processing of the results of refractometric and spectral measurements on the basis of the Kramers-Kronig formalism, the dispersion dependences of the vibrational polarizabilities of the given molecules were calculated and the integrated intensities of their fundamental vibrational bands were refined. A table of values of total and vibrational polarizabilities at the emission frequencies of the CO2 laser was compiled. (C) 2001 MAIK "Nauka/Interperiodica".