Mise en œuvre du multidétecteur 4π γ TAPS au GANIL

Abstract : The study of the hard photons production originating in heavy ion collisions from bremstrahlung radiation or from the decay of neutral mesons like π0 and η, is an original approach towards the understanding of the dynamics of nuclear reactions and of the behaviour of nuclear matter. The 4 π multidetector TAPS has been constructed for that purpose. Many european laboratories joined their efforts to achieve the equipment. It is therefore also foreseen to use it at various accelerators delivering heavy ions between 10 and 2000 MeV/u and electrons of up to 800 MeV. In the first part of this work, the reasons for the choice of TAPS are described. The second part describes the particular mechanical set up used at GANIL together with its electronics and data acquisition system. In the third part the methods for simulating the response of the detectors are explained. The fourth and last part contains the data analysis of an experiment using the reaction 129Xe + 197Au at 44 MeV/u. The first results are very stimulating and demonstrate that TAPS is well suited to the detection of photons in an important hadronic noise. It has also been demonstrated that the detection of very rare events like subthreshold pions, is possible thanks to the excellent performances of TAPS
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R. Merrouch. Mise en œuvre du multidétecteur 4π γ TAPS au GANIL. Physique Nucléaire Expérimentale [nucl-ex]. Université de Caen, 1991. Français. ⟨tel-01371482⟩

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