The fusion dynamics of ^(6)Li and ^(7)Li projectiles incident on the ^(13)C and ^(12)C targets,respectively,near the Coulomb barrier,were investigated theoretically using the antisymmetrized molecular dynamics(AMD)mod...The fusion dynamics of ^(6)Li and ^(7)Li projectiles incident on the ^(13)C and ^(12)C targets,respectively,near the Coulomb barrier,were investigated theoretically using the antisymmetrized molecular dynamics(AMD)model.Within the AMD framework,the ground-state configurations of ^(6)Li and ^(7)Li exhibit pronounced deformation characterized by well-developed d+α and t+α clustering structures,respectively.Reaction simulations were performed across a center-of-mass energy range of 3−7.6MeV,encompassing the fusion barrier region.The total fusion cross sections computed as a function of collision energy demon-strate favorable quantitative agreement with the experimental values at energies above the Coulomb barrier.Additionally,a detailed comparison was made of the partial cross sections into specific residual fragments predicted by AMD at different center-of-mass energies.The AMD model provides a robust microscopic description of light-heavy-ion fusion dynamics and captures the role of extended density distributions and cluster correlations within interacting nuclei.展开更多
The fusion excitation functions for 12 colliding systems with 96≤Z_(1)Z_(2)≤608 are analyzed using coupled-channel(CC)calculations based on the M3Y double-folding(DF)potential supplemented with a repulsive potential...The fusion excitation functions for 12 colliding systems with 96≤Z_(1)Z_(2)≤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 T^(2)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.展开更多
基金supported by the National Natural Science Foundation of China(Nos.12465024 and 12365018)Natural Science Foundation of Inner Mongolia(Nos.2024ZD23,2024FX30 and 2023MS01005)+1 种基金the program of Innovative Research Team and Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region(Nos.NMGIRT2217 and NJYT23109)the Central Government Guidance for Local Science and Technology Development Funds Project(No.2025ZY0067).
文摘The fusion dynamics of ^(6)Li and ^(7)Li projectiles incident on the ^(13)C and ^(12)C targets,respectively,near the Coulomb barrier,were investigated theoretically using the antisymmetrized molecular dynamics(AMD)model.Within the AMD framework,the ground-state configurations of ^(6)Li and ^(7)Li exhibit pronounced deformation characterized by well-developed d+α and t+α clustering structures,respectively.Reaction simulations were performed across a center-of-mass energy range of 3−7.6MeV,encompassing the fusion barrier region.The total fusion cross sections computed as a function of collision energy demon-strate favorable quantitative agreement with the experimental values at energies above the Coulomb barrier.Additionally,a detailed comparison was made of the partial cross sections into specific residual fragments predicted by AMD at different center-of-mass energies.The AMD model provides a robust microscopic description of light-heavy-ion fusion dynamics and captures the role of extended density distributions and cluster correlations within interacting nuclei.
文摘The fusion excitation functions for 12 colliding systems with 96≤Z_(1)Z_(2)≤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 T^(2)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.
