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Mouvements collectifs dans les noyaux : des vibrations à la fusion

Abstract : This manuscript is devoted to the study of collective behaviors encountered in nuclear physics. The time dependent energy density functional method (TDEDF) is one of the most achieved model for such studies. One of the first implementation of TDEDF formalism treating pairing correlation (through the resolution of the time dependent Hartree-Fock-Bogoliubov equations) is presented. In a second part, we apply the TDEDF formalism to the study of some collective excitations. First, we focus on the study of structure and decay properties of the giant monopole resonance in some closed shells nuclei. The study of another type of excitation of the atomic nucleus is also investigated : the pairing vibrations. The impact of different energy density functionals is discussed. The third part of this work is devoted to the synthesis of the heaviest elements through nearly symmetric heavy ions fusion. The latter is known to present fusion hindrance. This phenomenon is illustrated through the TDEDF formalism. A test experiment has finally been undertaken at GANIL for the system Xe{136}+Sn{124}->Rf{260}*. No evaporation residue has been identified, and a maximal cross-section of 81 pb has been deduced for the 2n channel. Experimental difficulties encountered during this experiment are discussed, in particular in the perspective of the use of a new generatio of radioactive ions beams such as those which will be available at Spiral2.
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Submitted on : Tuesday, June 15, 2010 - 2:51:18 AM
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Benoît Avez. Mouvements collectifs dans les noyaux : des vibrations à la fusion. Physique Nucléaire Théorique [nucl-th]. Université Paris Sud - Paris XI, 2009. Français. ⟨tel-00492067⟩

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