CASCADE STATISTICAL-MODEL FOR NUCLEON-INDUCED REACTIONS ON LIGHT-NUCLEI IN THE ENERGY-RANGE 50 MEV-1 GEV

We present here the first systematic and global analysis of nucleon-induced reactions on A<30 systems at incident energies of 50 MeV to 1 GeV by means of a cascade-statistical approach. Model simulations are tested against available data from nuclei such as C, N, O, Al, and Si. With one set of inputs provided here, most of the inclusive observables, such as the double differential spectra of light ions and heavy residual nuclei from the dominant channels, can be well reproduced. The model yields absolute cross sections and the calculations are done without any parameter adjustments. Given the success of this simple, classical approach, we reexamine the model in terms of the essential physics such as Pauli principle, Fermi motion, and medium corrections. We interpret the cascade part as a classical simulation of the intermediate multi-particle-hole configurations which dominate multistep-direct and preequilibrium reactions and provide a critical assessment of the microscopic foundation and the range of validity of the model. We also discuss possible extensions of this model to around Fermi energy. © 1990 The American Physical Society.