Interferometric Determination of the Dispersion of Vibrational Polarizability and the Integrated Intensities of Fundamental Bands of ~(32,34)SF_6 and NF_3 Molecules

摘要

The refractivity of gaseous SF_6 and NH_3 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 CO_2 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 CO_2 laser was compiled.