A simple method to interpret the Principal Component Analysis result from a set of Total Reflection Resonant Inelastic X-Ray Scattering spectra

J. ROBLEDO; J. J. LEANI; H. J. SÁNCHEZ

Conferencia; TXRF 2019; 2019

We show a novel approach to the understanding of the results provided by a Principal Component Analysis (PCA), which may be useful for spectroscopist that are unfamiliar to PCA. It is based on re-constructing the spectra under study, through a simple method, only with the portion of the total variance kept by the k principal components under consideration. In this way, the reconstructed spectrum is a visual representation of the kept variance, which allows for a more intuitive interpretation of the results. The potential of this method is shown by applying it to Resonant Inelastic X Ray Scattering spectra measured in Energy Dispersive mode and under total reflection[1], resulting in the straightforward step to the EDIXS technique[2].