Distribution of sources powered by SF or AGNs, as a function of NB Hα luminosity and cluster-centric radius. Squares mark sources in merging clusters, and circles represent sources in relaxed clusters. Star-forming galaxies are marked with purple circles, AGNs with pink squares, and composite sources with orange squares. The luminosity and radius distributions for different ionization types reflect the broad selection of sources in both merging and relaxed clusters. We fully match the samples for the analysis by selecting only sources within 4500 kpc and with Hα luminosities in the 10⁴⁰–10⁴² erg s⁻¹ range.