By Institute of Physical Chemistry, Bulgarian Academy of Sciences
The apparatus is used for quantitative and qualitative chemical analysis of the uppermost atomic layers of solids surfaces by X-ray photoelectron spectroscopy (XPS). The AXIS Supra (Kratos Analitycal Ltd.) electron spectrometer has the following characteristics: - Monochromatic Al Kα and Ag Lα X -ray sources with photon energies of 1486.6 eV and 2984.3 eV, respectively; - Achromatic Al Kα and Mg Kα X -ray sources with photon energies of 1486.6 eV and 1253.6 eV; - Neutralization system against the surface charging due to electron photoemission; - Cleaning the sample surfaces using ion bombardment (with Ar + ions), followed by chemical analysis (depth profiling); - Analysis at different angles to the surface (only for atomic smooth surfaces); - Chemical imaging of the surfaces; - Software processing of the measured spectra using a company program ESCApe.
