Fusion-fission angular distributions: a new probe of fast fission fractionation in nucleus-nucleus collisions

Abstract

Fragment angular distributions in heavy ion-induced fission reactions have been analysed in terms of a two component model-fission following compound nucleus formation and fast fission events. It is seen that, contrary to the general assumption, fast fission competes with compound nucleus fission even when the composite system is formed with a spin less than the rotating liquid drop model limit for vanishing fission barrier.