NUCLEAR MULTIFRAGMENTATION - ANTIPROTONS VERSUS PHOTONS AND HEAVY-IONS

Nuclear multifragmentation is the phenomenon by which a nucleus breaks into many pieces of intermediate size. It occurs in the excitation-en ergy regime, between the spallation + evaporation regime and the explo sive fragmentation regime. The various models of multifragmentation ar e briefly reviewed and the possibility of critical behavior in the mul tifragmentation process is underlined. Unanswered problems are stated. It is shown, by model calculations, that antiproton annihilation is, in many respects, better suited than proton-nucleus and heavy-ion coll isions for studying multifragmentation and, in other respects, complem entary to these other tools.