Determination of the excitation function for nuclear reactions in beryllium induced by helium-3

• Autor(a) principal: Vítor, Carlos Eduardo Martins de Miranda
• Data de Publicação: 2022
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10362/134613
• topic: 3He crosssection; NRA; 3He; 9Be; NDF; Fusion; Domínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e Tecnologias

In 2020 the Internationa lAtomic Energy Agency (IAEA)created a Coordinated Research Project (CRP) devoted to the" Development and Application of Ion BeamTechniques for Materials Irradiation and Characterization relevant to Fusion Technology" (CRP Code F11023). The discrepancies and lack of data on fundamental parameters required for ion beam analysis techniques, lead it to be set as project priority the experimental data collection for the differential cross section calculation of nuclear reactions induced by 3He in 6Li,7Li,9Be,10B,11B, 12C and 13C. The main contribution made by this work to the goals of the project was the experimental determination of the excitation function for the proton groups 9Be 3He, pi 11B (i = 0 9). The differential cross sections were obtained using a thin beryllium film target for angles between 110 and 165 with a5 step and int he energy range between 1.0MeV and 2.5 MeV, which is the typical energy range for the ion beam analysis techniques. The results were compared with the two previous studies in the same energy range and differing bya factor of 1.4 between them.The results are in very good agreement with one of these studies and were benchmarked with the measurement of a pure beryllium thick target reaction yields at 2.5 MeV for 135 . The calculated cross sections are presented in graphical form for135 and are also given as tables in the Appendix for all the measured angles.