Fusion process studied with preequilibrium giant dipole resonance in time dependent Hartree-Fock theory

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dc.creatorSimenel, Cédric
dc.creatorChomaz, Philippe
dc.creatorDe France, Gilles
dc.date2007-04-04
dc.date2007-08-24
dc.date.accessioned2026-07-07T10:35:26Z
dc.date.available2026-07-07T10:35:26Z
dc.descriptionThe equilibration of macroscopic degrees of freedom during the fusion of heavy nuclei, like the charge and the shape, are studied in the Time-Dependent Hartree-Fock theory. The pre-equilibrium Giant Dipole Resonance (GDR) is used to probe the fusion path. It is shown that such isovector collective state is excited in N/Z asymmetric fusion and to a less extent in mass asymmetric systems. The characteristics of this GDR are governed by the structure of the fused system in its preequilibrium phase, like its deformation, rotation and vibration. In particular, we show that a lowering of the pre-equilibrium GDR energy is expected as compared to the statistical one. Revisiting experimental data, we extract an evidence of this lowering for the first time. We also quantify the fusion-evaporation enhancement due to gamma-ray emission from the pre-equilibrium GDR. This cooling mechanism along the fusion path may be suitable to synthesize in the future super heavy elements using radioactive beams with strong N/Z asymmetries in the entrance channel.
dc.description15 pages, 19 figures, revised version
dc.identifierhttps://arxiv.org/abs/0704.0496
dc.identifierhttp://arxiv.org/abs/0704.0496
dc.identifierPhys.Rev.C76:024609,2007
dc.identifierdoi:10.1103/PhysRevC.76.024609
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/179750
dc.subjectNuclear Theory
dc.titleFusion process studied with preequilibrium giant dipole resonance in time dependent Hartree-Fock theory
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