The percolation approach in nuclear physics

Nuclear collisions at intermediate energies show up two different regimes: spallation and multifragmentation. We have developed a simple model of nuclear reactions that is based on percolation. This model exhibits the transition between the two possible regimes. Parameters appearing in percolation are related to the reactions conditions. With the help of simulations and also analytically, we can calculate various quantities such as mass yields, linear momentum transfers and fragments multiplicities. The agreement with experimental data is, generally, rather good. Thus, we can say that percolation, though schematic, appears as a useful framework to discuss heavy ions collisions at various incident energies