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We present radio observations at 610 MHz, 330 MHz and 235 MHz, carried out with the Giant Metrewave Radio Telescope (GMRT, Pune, India) of three clusters of galaxies at different merging stages. The purpose of our work is to investigate the connection between cluster merger parameters (i.e. masses, ages, impact parameter) and the formation of radio halos and relic sources. [ABSTRACT FROM AUTHOR]

The central regions of superclusters, being the observative counterpart of the intersections of the large scale filaments, are the formation loci of rich galaxy clusters. In these environments, the fraction of merging is enhanced and the probability of a major merging (the collision of similar mass clusters) event is high. In these conditions it is possible to study not only such mergings but also the related astrophysical consequences, like the formation of radio halos and relics and the effect on the emission of the galaxy population. Here we present our recent results on the A3558 complex and the A3528 cluster in the Shapley Concentration and on the A2061-A2067 pair in the Corona Borealis supercluster. [ABSTRACT FROM AUTHOR]