DETERMINATION OF THE TYPE OF COLLISIONS OF MOLECULES IN A GAS AND OF COLLISIONAL NARROWING COEFFICIENT USING THE VOIGT PROFILE OF A SPECTRAL-LINE

An algorithm is developed for analysis of the absorption spectral line profiles by means of the Voigt function which allows one to determine the type of collisions of molecules in a gas and the collisional narr owing coefficient. The accuracy of measurements of the Lorentzian widt h and integrated intensity of the line are of the same order of magnit ude as for fitting spectral lines with Rautian-Sobel'man and Galatry p rofiles. The error of measurement of the collisional narrowing coeffic ient does not exceed 10%, which is better than for fitting with Rautia n-Sobel'man and Galatry profiles in the case of collisions of the unkn own type when the error amounts to 30-50%.