Non-collective excitations in low-energy heavy-ion reactions: applicability of the random-matrix model

Abstract

We investigate the applicability of a random-matrix model to the description of non-collective excitations in heavy-ion reactions around the Coulomb barrier. To this end, we study fusion in the reaction ${}^{16}$O + ${}^{208}$Pb, taking account of the known non-collective excitations in the ${}^{208}$Pb nucleus. We show that the random-matrix model for the corresponding couplings reproduces reasonably well the exact calculations, obtained using empirical deformation parameters. This implies that the model may provide a powerful method for systems in which the non-collective couplings are not so well known.

6 pages, 4 figures

References in corpus (6)

• Subbarrier fusion reactions and many-particle quantum tunneling
• Dissipative quantum dynamics in low-energy collisions of complex nuclei
• 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 low-energy heavy-ion reactions
• Absence of decoherence in the complex potential approach to nuclear scattering
• Role of non-collective excitations in heavy-ion fusion reactions and quasi-elastic scattering around the Coulomb barrier

Cited by in corpus (3)

• Systematic investigations of deep sub-barrier fusion reactions using an adiabatic approach
• Quantum tunneling with friction
• Present status of coupled-channels calculations for heavy-ion subbarrier fusion reactions