Systematics of threshold incident energy for deep sub-barrier fusion hindrance

Abstract

We systematically evaluate the potential energy at the touching configuration for heavy-ion reactions using various potential models. We point out that the energy at the touching point, especially that estimated with the Krappe-Nix-Sierk (KNS) potential, strongly correlates with the threshold incident energy for steep fall-off of fusion cross sections observed recently for several systems at extremely low energies. This clearly indicates that the steep fall-off phenomenon can be attributed to the dynamics after the target and projectile touch with each other, e.g., the tunneling process and the nuclear saturation property in the overlap region.

5 pages, 3 figures

References in corpus (3)

• Study of the 12C+12C fusion reactions near the Gamow energy
• Existence of One-Body Barrier Revealed in Deep Sub-Barrier Fusion
• Probing internucleus potential with large-angle quasi-elastic scattering

Cited by in corpus (7)

• Microscopic study of Ca$+$Ca fusion
• Density-constrained time-dependent Hartree-Fock calculation of ${}^{16}$O+${}^{208}$Pb fusion cross sections
• ${}^{64}$Ni+${}^{64}$Ni fusion reaction calculated with the density-constrained time-dependent Hartree-Fock formalism
• Hindrance in the fusion of ${}^{48}$Ca+${}^{48}$Ca
• Potential inversion with subbarrier fusion data revisited
• Cluster formations in deformed states for ${}^{28}$Si and ${}^{32}$S
• Potential roots of the deep sub-barrier heavy-ion fusion hindrance phenomenon