Investigation of the quasifission process in the synthesis of superheavy nuclei
Phys. Rev. C 113, 024604 – Published 2 February, 2026
DOI: https://doi.org/10.1103/4lds-6msh
Abstract
Based on the dinuclear system model, this work systematically investigates the quasifission process across different entrance channels and excitation energies. The calculated mass yield and average total kinetic energy distributions show good agreement with experimental data, confirming the model's validity in describing key observables of quasifission. It is revealed that excitation energy, entrance channel mass asymmetry, and Coulomb factor are critical factors governing the quasifission process. The mass asymmetry of the entrance channel plays a decisive role in selecting the reaction path: a lower mass asymmetry leads to a higher relative yield of asymmetric quasifission products. In contrast, Coulomb repulsion significantly shortens the interaction time, thereby suppressing the formation of symmetric quasifission fragments. Furthermore, the study reveals a coupling mechanism between nuclear shell effects and entrance-channel conditions during fragment formation, offering a clear physical interpretation for advancing the understanding of reaction dynamics in superheavy element synthesis.
