Figure 5

Model’s discriminative power. Panel (a) behavior of the \(f(\delta _1,\delta _2)\) Eq. (27) as a function of \(\Delta\), obtained from synthetic DW-NMR signals of BM and SS at different \(\delta\), \(D=2\times 10^{-9} \; {\text {m}}^2~{\text {s}}^{-1}\) and \(g=0.01\) T/m. We used a Gamma distribution as PDF with \(\theta =2\times 10^{-9} \; {\text {m}}^2~{\text {s}}^{-1}\) and \(k=0.5\). Panel (b) behavior of the same quantity as in panel (a), obtained from synthetic DW-NMR signals of FBM and CTRW with \(\alpha =0.5\), \(D_{\alpha }=2\times 10^{-9} \; {\text {m}}^2~{\text {s}}^{-\alpha }\) and the same g as in panel (a) . The deviation from the Gaussian stationary signal is well visible.