2-DIMENSIONAL CHEMICAL-STATE PLOTS - STANDARDIZED DATA SET FOR USE IN IDENTIFYING CHEMICAL-STATES BY X-RAY PHOTOELECTRON-SPECTROSCOPY

The combined use of both photoelectron and X-ray excited Auger lines increases the utility of ESCA for identifying chemical states. A useful format for displaying reference data is the two-dimensional plot where the kinetic energy of the sharpest Auger line is plotted vs. the binding energy of the most intense photoelectron line. A compilation of data for 24 elements is presented, including critically evaluated data from the literature which have been referenced to a uniform calibration line. The format of the plots is applicable to data obtained with ionizing photons of any energy. The data included for silicon, bromine, and tungsten were obtained with higher energy X-ray from a Au X-ray source.