Figure 2.

(a) Simulated input (blue circles) and reconstructed (black curve) WAXTS data for a TiO₂ sample composed by the three phases: anatase, rutile and brookite. For the sake of clarity, the single phases (noiseless) contributions and a background profile have been shifted by − 1. The noise added to the data was generated according to a Poissonian distribution; (b) input (black curves) and recovered (colour curves) mass distributions of the three phases obtained by inverting the input data of (a); (c) relative residuals [(data-fit)/fit] between recovered and input data. The peak-to-peak fluctuations of ($\sim \pm 0.06$) are consistent with the noise level ($SNR\sim 300$) used in the simulation.