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

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

2010-07-07

arxiv.org/abs/1007.1067v1

Physics

Nuclear Physics

Nuclear Theory

8 pages, 7 figures

Scientific paper

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.

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