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Experimental advances on alpha nuclear potentials for the astrophysical p-process
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Resumo(s)
A dissertação ”Experimental advances on alpha nuclear potentials for the astrophysical pprocess” reflecte a actividade experimental realizada durante o período de estágio no ATOMKI, em Debrecen na Hungria, realizado sobre alçada do programa ERASMUS. Nesta dissertação será descrito o processo de preparação para a experiência de dispersão de partículas α em alvos de 64Zn, 113In e 115In. As ligações eléctricas, detectores e respectiva calibração, pré-amplificadores, amplificadores, assim como a resultante montagem experimental serão descritas em detalhe. Os resultados da experiência de dispersão de partículas α irão permitir calcular a secção eficaz dos elementos estudados, efectuar a comparação dos dados experimentais com as previsões teóricas dos modelos globais de potenciais α-nucleares. Permitirão também um estudo detalhado de ”famílias” de potenciais locais com vista a melhorar os modelos de previsão teóricos e assim aprofundar o conhecimento na área da astrofísica.
The subject of the present Master Thesis ”Experimental advances on alpha nuclear potentials for the astrophysical p-process” is the experimental activity performed during my training period at ATOMKI in Debrecen, Hungary, under the ERASMUS program tutelage. In this dissertation the process will be described for preparation of the experiment of elastic α scattering from 64Zn, 113In and 115In targets. The electric connections, detectors and their calibration, pre-amplifiers, amplifiers, and the overall experimental setup is described in detail. The results of this experiment will allow the calculation of the cross section of the studied elements, perform the comparison of the experimental data with theoretical predictions of the most accepted models for global α–nucleus potentials . The results will also allow for a detailed study about the ”families” of local α–nucleus potentials in order to improve the predictive power of the existent theoretical models and the overall knowledge in the area of astrophysics.
The subject of the present Master Thesis ”Experimental advances on alpha nuclear potentials for the astrophysical p-process” is the experimental activity performed during my training period at ATOMKI in Debrecen, Hungary, under the ERASMUS program tutelage. In this dissertation the process will be described for preparation of the experiment of elastic α scattering from 64Zn, 113In and 115In targets. The electric connections, detectors and their calibration, pre-amplifiers, amplifiers, and the overall experimental setup is described in detail. The results of this experiment will allow the calculation of the cross section of the studied elements, perform the comparison of the experimental data with theoretical predictions of the most accepted models for global α–nucleus potentials . The results will also allow for a detailed study about the ”families” of local α–nucleus potentials in order to improve the predictive power of the existent theoretical models and the overall knowledge in the area of astrophysics.
Descrição
Tese de mestrado em Engenharia Física, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2012
Palavras-chave
p-process Supernova tipo II Dispersão elástica α Secção eficaz de interacção Potenciais α-nucleares Teses de mestrado - 2012