Using recent high-statistics STAR data from Au+Au and Cu+Cu collisions at full RHIC energy I discuss strong and Coulomb-induced final state interaction effects on identical (pi-pi) and non-identical (pi-xi) particle correlations. Analysis of pi-xi correlations reveals the strong and Coulomb-induced FSI effects, allowing for the first time to estimate spatial extension of pi and xi sources and the average shift between them. Source imaging techniques provide clean separation of details of the source function and are applied to the one-dimensional relative momentum correlation function of identical pions. For low momentum pions, and/or non-central collisions, a large departure from a single-Gaussian shape is observed.
Heavy ions; Femtoscopy
