Fourier analysis for the isothermal capacitance transient spectroscopy signal

Abstract
In an isothermal capacitance transient spectroscopy (ICTS) measurement, analysis of the results is based on the assumption of an exponential capacitance transient. We propose the use of Fourier analysis for the ICTS signal which arises from nonexponential transient capacitance. The method allows us to determine deep levels which have adjacent emission time constants.