Energy dependence of nucleus-nucleus potential close to the Coulomb barrier

Simple item page
dc.creatorWashiyama, Kouhei
dc.creatorLacroix, Denis
dc.date2008-04-17
dc.date2008-08-12
dc.date.accessioned2026-07-07T11:49:57Z
dc.date.available2026-07-07T11:49:57Z
dc.descriptionThe nucleus-nucleus interaction potentials in heavy-ion fusion reactions are extracted from the microscopic time-dependent Hartree-Fock theory for mass symmetric reactions $^{16}$O${}+^{16}$O, $^{40}$Ca${}+^{40}$Ca, $^{48}$Ca${}+^{48}$Ca and mass asymmetric reactions $^{16}$O$ +^{40,48}$Ca, $^{40}$Ca${}+^{48}$Ca, $^{16}$O+$^{208}$Pb, $^{40}$Ca+$^{90}$Zr. When the center-of-mass energy is much higher than the Coulomb barrier energy, potentials deduced with the microscopic theory identify with the frozen density approximation. As the center-of-mass energy decreases and approaches the Coulomb barrier, potentials become energy dependent. This dependence signs dynamical reorganization of internal degrees of freedom and leads to a reduction of the "apparent" barrier felt by the two nuclei during fusion of the order of $2-3 %$ compared to the frozen density case. Several examples illustrate that the potential landscape changes rapidly when the center-of-mass energy is in the vicinity of the Coulomb barrier energy. The energy dependence is expected to have a significant role on fusion around the Coulomb barrier.
dc.description11 pages, 13 figures, 1 table, discussion of effects of coordinate-dependent mass added, accepted for publication in Phys. Rev. C
dc.identifierhttps://arxiv.org/abs/0804.2823
dc.identifierhttp://arxiv.org/abs/0804.2823
dc.identifierPhys.Rev.C78:024610,2008
dc.identifierdoi:10.1103/PhysRevC.78.024610
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203414
dc.subjectNuclear Theory
dc.titleEnergy dependence of nucleus-nucleus potential close to the Coulomb barrier
dc.typetext

Files

Collections

arXiv