• Book : 114()
• Pub. Date : 2025
• Page : pp.381-403
• Keyword :

• Book : 199(1)
• Pub. Date : 2025
• Page : pp.176-183
• Keyword :

• Book : 211()
• Pub. Date : 2025
• Page : pp.110969
• Keyword :

• Book : 211()
• Pub. Date : 2025
• Page : pp.110967
• Keyword :

• Book : 211()
• Pub. Date : 2025
• Page : pp.110968
• Keyword :

• Book : 213()
• Pub. Date : 2025
• Page : pp.111070
• Keyword :

Abstract

The fusion excitation functions for 12 colliding systems with 96 ≤ Z1Z2 ≤ 608 are analyzed using coupled-channel (CC) calculations based on the M3Y double-folding (DF) potential supplemented with a repulsive potential that takes into account the incompressibility of the nuclear matter. We also applied the polarization effects of hot nuclear matter (PEHNM) on the calculations of the bare nucleus--nucleus interaction potential within the framework of the modified density-dependent Seyler-Blanchard (SB) approach in the T² approximation. Our results reveal that we obtain a nice description of the experimental data of different fusion systems when we use the present theoretical approach to calculate the energy-dependent values of the fusion cross sections. In this paper, the influence of the PEHNM on the surface diffuseness parameter of the Woods-Saxon (WS) potential is also studied. In order to reach this goal, we extract the corresponding values of this parameter based on the modified form of the DF potential (M3Y+Repulsion+polarization). We find that the extracted values are located in a range between a = 0.61 and 0.80 fm at different incident energies. It seems that the polarization effects of hot nuclear matter play a key role in describing the abnormally large values of the nuclear potential diffusenesses in the heavy-ion fusion reactions. Additionally, the regular decreasing trend for the diffuseness parameter of the nucleus-nucleus potential with the increase in the bombarding energies is also observed.

• Book : 77(3)
• Pub. Date : 2025
• Page : pp.035301
• Keyword :

Abstract

Evaporation residue cross-sections have been measured for ¹⁹F+^142,150Nd reactions in the energy range 15% below to 30% above the Coulomb barrier at the Inter-University Accelerator Centre, New Delhi, using the heavy ion reaction analyzer (HIRA). The measured fusion excitation functions were compared with the calculations using the coupled channels code CCFULL, including different couplings of the reactants. Fusion barrier distribution is extracted from the measured fusion cross-sections. Significant enhancement in fusion cross-section is observed in both reactions at sub-barrier energies. Enhancement is larger for the ¹⁹F+¹⁵⁰Nd reaction compared to the ¹⁹F+¹⁴²Nd reaction. The coupling of target excitations alone could not reproduce the observed fusion enhancement in both systems at sub-barrier energies. Calculations have been performed treating ¹⁹F as a vibrational as well as a rotational nucleus. Coupled channels calculations assuming ¹⁹F as a rotor reproduce the fusion excitation function reasonably well in both systems. However, these calculations do not require the coupling of transfer channels despite the presence of positive Q-value transfer channels in both systems. This warrants transfer cross-section measurements in both systems.

• Book : 52(1)
• Pub. Date : 2025
• Page : pp.015106
• Keyword :

• Book : 121(1)
• Pub. Date : 2025
• Page : pp.250-260
• Keyword :

• Book : 121(1)
• Pub. Date : 2025
• Page : pp.282
• Keyword :