Comparisons of both the NESSI neutron multiplicities and the double-differential cross-sections measured at SATURNE with predictions of different models widely used in high-energy transport codes are presented. The main conclusion is that the combination of the Bertini intra-nuclear cascade with the Dresner-Atchison evaporation-fission models used with the default options in LAHET shows serious deficiencies, especially at high incident energies. These are due mainly to an overprediction of the excitation energy by the Bertini model at the end of the first stage of the reaction. On the contrary, it is found that the use of the Cugnon intra-nuclear cascade model, INCL2, is able to fairly reproduce the whole bulk of both NESSI and SATURNE results. However, this model still suffers from some defects mostly due to the fact this it does not treat correctly the diffuseness of the nuclear surface. This should be solved in the new version, INCL4, under progress in WP8. |
