Comparison of femtoscopic radii, as a function of the measured charged-particle multiplicity density $\langle N_{\rm ch}\rangle^{1/3}$, at low (a) and high (b) $k_{\rm T}$ obtained in pp , p--Pb and Pb--Pb collisions. Statistical (lines) and systematic uncertainties (boxes) are shown. | ![](https://alice-publications.web.cern.ch/sites/default/files/papers/5201/Rinv_lowkt_fit-96789.png ) ![](https://alice-publications.web.cern.ch/sites/default/files/papers/5201/Rinv_highkt_fit-96791.png ) |