A generalized autocorrelation function and spectral density in dielectric relaxation processes.

Abstract

This paper presents an analytical formulation of the dielectric relaxation constant of polar liquids In the microwave frequency range, based in the complex nature of the autocorrelation function Φ*(t) for the orientational electric polarization and the spectral density I*(ω). The real and imaginary parts behave as Hilbert transforms, and it is possible to establish some relation between the different moments of Φ*(t) and I*(ω), extending the spectroscopic methods of the far infrared.