يوسف عبد الحكيم عبد الحسين الناصر

The elastic channel coupling in the fusion reaction calculations is of Controversial nature due to its results of either enhancing or hinder the fusion reaction calculations under the Coulomb barrier. The study of the effect of channel coupling by means of two quantum mechanical approaches by introducing the concept of the excitation function on the cross section of fusion calculations “σF (mb)”, barrier distributions “DF (mb/MeV)” and the probability PF for the systems 16O+16O, 12C+12C and 16O+12C. The excitation functions represent the main and important part in the fusion reaction calculations, therefore it is incorporated in different quantum mechanical approaches form the compression with the corresponding measured data showed that the channel coupling considered by means of the excitation function enhances the calculations especially under the Coulomb barrier. This comparison showed that although the approach adopted in the CC code is more simpler that the CCFULL code, but it is very competitive and might be considered as compensate for the well-known CCFULL calculations.

he effects of coupled-channels in heavy-ion fusion reaction for the system 40Ca + 192Os, 40Ca + 194Pt, and 48Ca + 197Au are discussed. The fusion cross-section σfus, the fusion barrier distribution Dfus and fusion probability Pfus are also discussed. The fusion barrier distribution is calculated using numerical three point, five point and Wong methods. Full quantum coupled-channels calculations are performed using CCFULL code with all order coupling to compare and with available experimental data. The χ² values for the case of no-coupling and coupling effects included shows clearly that the present calculations are in agreement with the experimental.