Determination of molecular light scattering spectral lines parameters with help of regularized frequency moments

A new direct method of determination of spectral line parameters is expounded by means of regularized frequency moments, complete set of which is well defined even for slowly declined spectral functions of Lorentz type. Regularized frequency moments are integral properties of spectral lines and therefore they are least sensitive to random errors. As an illustration the developped method was applied to contoures corresponded to one or superposition of several Lorenzians for determination of relaxation time of anisotropy of disubstituted benzene molecules.