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Aspects théoriques et expérimentaux des réactions de multifragmentation dans les collisions noyau-noyau aux énergies intermédiaires

Abstract : The multiple fragmentation phenemenon is observed in the nucleus-nucleus collisions, at intermediate energies. The experimental and theoretical investigation of the reaction mechanism, is performed. The process is theoretically described, by applying dynamical and fragmentation models. The dynamical phase simulation is carried out by means of the Landau-Vlasov calculations, which are performed up to the obtention of a low density system. A statistical fragmentation model is applied. The results show that a multiple fragmentation must occur at intermediate energies; and that the reaction threshold energy and properties are bound to the nuclear matter state equation. The evolution mechanisms of the Argon-on-Aluminum system experiment, from 25 to 85 MeV per nucleon, are analyzed. It allows both the collisions classification as a function of their impact parameter and the selection of the central collisions. The existence of the multiple fragmentation phenomenom is pointed out.
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http://hal.in2p3.fr/tel-01095349
Contributor : Michel Lion <>
Submitted on : Monday, December 15, 2014 - 2:43:59 PM
Last modification on : Thursday, October 1, 2020 - 2:16:02 PM
Long-term archiving on: : Saturday, April 15, 2017 - 8:45:57 AM

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  • HAL Id : tel-01095349, version 1

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D. Cussol. Aspects théoriques et expérimentaux des réactions de multifragmentation dans les collisions noyau-noyau aux énergies intermédiaires. Physique Nucléaire Expérimentale [nucl-ex]. Université de Caen, 1989. Français. ⟨tel-01095349⟩

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