Emission of intermediate mass fragments at high excitation energy

One of the principal characteristics of nuclear multifragmentation is the emission of complex fragments of intermediate mass. We have developed an extension of the statistical multi-fragmentation model, in which it becomes the near simultaneous limit of a sequential decay model. In this extension, intermediate mass fragment emissions are described by expressions almost identical to those of light particle emission. At lower temperatures, similar expressions have been shown to furnish a good description of very light intermediate mass fragment emission but not of the emission of heavier fragments, which seems to be determined by the transition density at the saddle-point rather than at the scission point. Here, we wish to compare these different formulations of intermediate fragmment emission and analyze the extent to which they remain distinguishable at high excitation energy.