Year: 2026
Type: article
Abstract: The Extended Quantum Diffusion Approach (EQDA), incorporating coordinate-dependent friction, is applied to a systematic study of capture cross sections for various projectile-target combinations involving the actinide nuclei ($^{238}$U, $^{244}$Pu, and $^{248}$Cm). For reactions with positive $Q_{2n}$ values, the two-neutron transfer is assumed to occur before capture, leading to an effective post-transfer entrance channel with modified nuclear properties and quadrupole deformations. The calculated excitation functions describe the available experimental data reasonably well down to deep sub-barrier energies, reaching about 15 MeV below the spherical Coulomb barrier. The systematic analysis shows that the sub-barrier slopes of excitation functions are governed by an interplay between nuclear deformation and the dissipative entrance-channel dynamics. The comparison of the initial and effective post-transfer channels illustrates the influence of the adopted effective-channel prescription, including the change in the projectile deformation description, while the comparison with constant friction demonstrates the role of coordinate-dependent dissipation in the deep sub-barrier region.
Source: Chinese Physics C
Institution: Joint Institute for Nuclear Research
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7225430916