Limit to sequential fission of highly excited nucleus

Sequential fission is one of the several kinds of theoretical production for hot nucleus decay. By analysing relevant experimental results such as fission time scale, pre-fission neutron emission, fission cross sections and their variation with excitation energy, the results of multifragmentation and the time scale of complex fragment emission, a limit to the sequential fission of the hot nucleus is suggested. A transition from intermediate mass fragment evaporation to multifragmentation seems a possible evolution of the hot nucleus decay with excitation energy