Role of non-collective excitations in low-energy heavy-ion reactions

Abstract

We investigate the effect of single-particle excitations on heavy-ion reactions at energies near the Coulomb barrier. To this end, we describe single-particle degrees of freedom with the random matrix theory and solve the coupled-channels equations for one-dimensional systems. We find that the single-particle excitations hinder the penetrability at energies above the barrier, leading to a smeared barrier distribution. This indicates that the single-particle excitations provide a promising way to explain the difference in a quasi-elastic barrier distribution recently observed in ${}^{20}$Ne + ${}^{90,92}$Zr systems.

8 pages, 7 figures

References in corpus (4)

• Random Matrices and Chaos in Nuclear Spectra
• Systematics of threshold incident energy for deep sub-barrier fusion hindrance
• Existence of One-Body Barrier Revealed in Deep Sub-Barrier Fusion
• Dissipative quantum dynamics in low-energy collisions of complex nuclei

Cited by in corpus (7)

• Coupled-channels calculations for nuclear reactions: from exotic nuclei to superheavy elements
• Systematic investigations of deep sub-barrier fusion reactions using an adiabatic approach
• Coupled-channels density-matrix approach to low-energy nuclear collision dynamics: A technique for quantifying quantum decoherence effects on reaction observables
• Role of non-collective excitations in heavy-ion fusion reactions and quasi-elastic scattering around the Coulomb barrier
• Quantum tunneling with friction
• Quasi-elastic scattering in the 20Ne + 90,92Zr reactions: role of non-collective excitations
• Non-collective excitations in low-energy heavy-ion reactions: applicability of the random-matrix model