I4P: An Igor Pro suite for photoemission analysis

A package based on the Igor Pro scripting language is proposed for the analysis of photoemission spectroscopy data (XPS, HAXPES, UPS). Compared to the already numerous available softwares, the Igor Pro Paris Photoemission Package (I4P) gathers in a single tool: (i) basic data analysis and plotting features (such as satellite/ghost line deconvolution, inelastic background subtraction, determination of the intensity-energy response function and its correction, peak overlap, energy-mass conversion in ion scattering spectroscopy), (ii) databases of binding energies, of photo-ionization cross sections, of inelastic/transport mean free paths and effective attenuation lengths, (iii) quantification based on elastic peak areas accounting for elastic scattering, (iv) depth profiling by angle-resolved photoemission and by inelastic background analysis, (iv) peak fitting with 17 different line shapes including background and fully configurable constraints between fit parameters. Aside a detailed manual including the references to the relevant literature, I4P comes not only with a graphical interface but also with scripting commands. Most of all, the free availability of the source code allows the potential user to easily develop additional options of data treatment.