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Abstract The fusion excitation functions for 12 colliding systems with 96 Z₁Z₂ 608 are analyzed using the coupled-channels (CC) calculations based on the M3Y double-folding (DF) potentialsupplemented with a repulsive potential that takes into account theincompressibility of the nuclear matter. We also applied thepolarization effects of hot nuclear matter (PEHNM) on thecalculations of the bare nucleus-nucleus interaction potentialwithin the framework of the modified density-dependentSeyler-Blanchard (SB) approach in the T² approximation. Ourresults reveal that we obtain a nice description of the experimentaldata of different fusion systems when we use the present theoreticalapproach to calculate the energy-dependent values of the fusioncross sections. In this paper, the influence of the PEHNM on thesurface diffuseness parameter of the Woods-Saxon (WS) potential arealso studied. In order to reach this goal, we extract thecorresponding values of this parameter based on the modified form ofthe DF potential (M3Y+Repulsion+polarization). We find that theextracted values locate in a range between a = 0. 61 and 0. 80 fm atdifferent incident energies. It seems that the polarization effectsof hot nuclear matter play a key role in describing the abnormallylarge values of the nuclear potential diffusenesses in the heavy-ionfusion reactions. Additionally, the regular decreasing trend for thediffuseness parameter of the nucleus-nucleus potential with theincrease in the bombarding energies is also observed.
Sani et al. (Tue,) studied this question.