Automated nonlinear alignment of XRF spectra

An important computational operation in a set of spectra is that of aligning them to a reference spectrum. In X‐ray fluorescence, this is referred to as energy calibration and may be necessary for fitting low‐count acquisitions. It may be useful for multi‐element detector systems. Typically, this is carried out in a linear manner, and sometimes requires user feedback. Automated methods exist but are often focused on specific type of data. We propose a new automated method that is based on a nonlinear approach and is specialised for X‐ray fluorescence data. The initial application in two different multi‐element detector systems in the TwinMic beamline (Elettra – Sincrotrone Trieste) yielded promising results. Copyright © 2016 John Wiley & Sons, Ltd.