GIANT-RESONANCES IN ATOMS, ATOMIC CLUSTERS, FULLERENES, CONDENSED MEDIA, AND NUCLEI

The properties of giant resonances in atoms, atomic clusters, condense d media, and nuclei are discussed. We present a comparative analysis o f similarities and differences between collective excitations in these physical objects. The main conclusion: the existence of the giant res onance phenomenon does not depend on the nature of the particles and t he interparticle forces. The necessary conditions are: the particles m ust be moving in a confining potential and the number of them should n ot be small.