What is the importance of Gaussian Lorentzian functions in XPS, if one can fit raw XPS data using Gaussian functions. Whatt is the effect of Gaussian Lorentzian fittings on the metallic, semiconducting and insulating materials?
In core level spectroscopy, you have to always use these two functions for fitting because of there importance in representing the physical phenomenon like core hole life time by lorentzian function and instrumental broadening by gaussin function. i hope it will help you for further discussion on this.