Nuclear (multi-)fragmentation

The Nuclear Lattice Model of Proton-induced Multi-fragmentation Reactions*

A model of proton-induced multi-fragmentation reactions based on percolation theory is described and applied to experimental data. With only the simplest of assumptions the essential features of the mass-yield curves, such as their U-shape and their power-law dependence for low-to-medium masses, are reproduced. However, the model is. as will be demonstrated, flexible enough to allow for the inc...

Nuclear fragmentation by tunneling

Fragmentation of nuclear system by tunneling is discussed in a molecular dynamics simulation coupled with imaginary time method. In this way we obtain informations on the fragmenting systems at low densities and temperatures. These conditions cannot be reached normally (i.e. above the barrier) in nucleus-nucleus or nucleon-nucleus collisions. The price to pay is the small probability of fragmen...

New scalings in nuclear fragmentation.

Fragment partitions of fragmenting hot nuclei produced in central and semiperipheral collisions have been compared in the excitation energy region 4-10 MeV per nucleon where radial collective expansion takes place. It is shown that, for a given total excitation energy per nucleon, the amount of radial collective energy fixes the mean fragment multiplicity. It is also shown that, at a given tota...

Stochastic Coalescence Multi-Fragmentation Processes

Fragmentation path of excited nuclear systems

We perform a study of the fragmentation path of excited nuclear sources, within the framework of a stochastic mean-field approach. We consider the reaction 129Xe + 119Sn at two beam energies: 32 and 50 MeV/A, for central collisions. It is observed that, after the compression phase the system expands towards a dilute configuration from which it may recontract or evolve into a bubble-like structu...