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Sections efficaces de production de pions et de kaons lors de collisions proton-noyau de l'ordre du GeV.
Mesures de sections efficaces de production de particules chargées légères lors de réactions induites par protons de 62,9 MeV sur cible de plomb.

Abstract : I - Cross-sections for pion and kaon production in proton nucleus collisions in the order of GeV.

The study of the hadrons properties in nuclear matter is a subject of interest at the present time. Positively charged kaons, having a strange anti-quark that can not be reabsorbed, are a very interesting tool to investigate the nuclear medium.
The first part of this thesis studies cross sections for pion and kaon production in proton nucleus collisions at incident energy in the order of GeV.
The Quantum Molecular Dynamics model to simulate proton nucleus collisions is described. Then, total cross sections of elementary processes implemented in the model are presented. Next, effects of the nucleon spectral function on pion and kaon production observed in double differential cross sections are discussed. Finally, consequences of the correlations observed among nucleons in nucleus are investigated.

II - Measurement of double differential cross sections for light charged particles production in proton induced reaction at 62,9 MeV on lead target.

In order to develop new options for nuclear waste management, studies are carrying out on the hybrid systems. The second part of this thesis takes place in the framework of the nuclear data linked to hybrid systems development. Theoretical codes should have sufficient predictive power in the energy range from 20 to 150 MeV. Thus it is necessary to measure new cross sections to constrain these codes.
The experiment aims to determine the double differential cross sections for light charged particles (p, d, t, 3He, a) production in proton induced reactions at 62,9 MeV on lead target 208Pb. The detection device consists of 7 triple telescopes, (Si, Si, CsI(Tl)).
The general context of this work is presented in the first place. Then, the experimental set up used for our measurements is described. The following chapters are dedicated to the data analysis.(particle discrimination, energy calibration) and double differential cross sections extraction. Finally, a comparative study between our experimental results and some theoretical predictions is presented.
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https://tel.archives-ouvertes.fr/tel-00011244
Contributor : Arnaud Guertin <>
Submitted on : Tuesday, December 20, 2005 - 3:55:15 PM
Last modification on : Thursday, August 6, 2020 - 11:00:05 AM
Long-term archiving on: : Saturday, April 3, 2010 - 7:42:30 PM

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  • HAL Id : tel-00011244, version 1

Citation

Arnaud Guertin. Sections efficaces de production de pions et de kaons lors de collisions proton-noyau de l'ordre du GeV.
Mesures de sections efficaces de production de particules chargées légères lors de réactions induites par protons de 62,9 MeV sur cible de plomb.. Physique Nucléaire Théorique [nucl-th]. Université de Nantes, 2001. Français. ⟨tel-00011244⟩

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