Dynamics of near-barrier fusion reactions: antisymmetrized molecular dynamics modeling of 6Li + 13C and 7Li + 12C

摘要: The fusion dynamics of \ce{^6Li} and \ce{^7Li} projectiles incident on \ce{^{13}C} and \ce{^{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 \ce{^6Li} and \ce{^7Li} exhibit pronounced deformation characterized by well-developed d+$\alpha$ and t+$\alpha$ clustering structures, respectively. Reaction simulations were performed across a center-of-mass energy range of \SI{3}-\SI{7.6}{\MeV}, encompassing the fusion barrier region. The total fusion cross sections computed as a function of collision energy demonstrate favorable quantitative agreement with 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, capturing the role of extended density distributions and cluster correlations within the interacting nuclei.