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Dynamique nucléaire autour de la barrière : de la fusion à l'évaporation

Abstract : This work is devoted to aspects of nuclear dynamic around the barrier. It is shown that for fusion reactions, the Coulomb field couples relative motion of nuclei to rotation of a deformed projectile independently of the energy and the charge of the nuclei. An experimental study of the reaction 6He+190Os via gamma spectroscopy of product nuclei has shown that the break up of the 6He is coupled to the relative motion too, resulting to a strong hindrance of the fusion around and above the fusion barrier. The way to fusion after the overcoming of the barrier, specially the charge equilibration, have been studied in the framework of the TDHF theory via the preequilibrium GDR excited in N/Z asymmetric reactions. An application to the formation of super-heavy elements has been proposed. Finally, couplings between protons and neutrons have been shown up in mean field calculations. Their main expected effect is an emission of protons under the Coulomb barrier.
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Submitted on : Monday, July 21, 2003 - 1:25:21 PM
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  • HAL Id : tel-00003142, version 1



Cédric Simenel. Dynamique nucléaire autour de la barrière : de la fusion à l'évaporation. Physique Nucléaire Théorique [nucl-th]. Université de Caen, 2003. Français. ⟨tel-00003142⟩



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