Uma abordagem teórico-experimental do método pico-soma e suas aplicações

• Ano de defesa: 2018
• Autor(a) principal: Araújo, Miriam Tainá Ferreira de
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio de Janeiro; Brasil; Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia; Programa de Pós-Graduação em Engenharia Nuclear; UFRJ
• Palavras-chave em Português: Método pico-soma; Padronização absoluta do 22Na; Padronização absoluta do 65Zn; Padronização absoluta do 60Co; Padronização absoluta do 121Te; CNPQ::ENGENHARIAS::ENGENHARIA NUCLEAR
• Link de acesso: http://hdl.handle.net/11422/13736

The sum-peak method has its use for the absolute standardization of radioisotopes emitting electromagnetic radiation under a coincidence regime. From the time of the conception of the method made in 1963 by Brinkman et al., the evolution of the experimental apparatus allowed improvements in the accuracy of the measurement of relevance parameters that are used to obtain the activity greatness for example. Some theoretical and conceptual inconsistencies were observed in the original proposal of the method, which will be carefully discussed and re-presented in this work. Therefore, the core of this research will consist of the presentation of a theoretical and experimental approach to the sum-peak method in order that the considerations attributed to it reaffirm it for application in absolute standardizations, and with that the same becomes more accepted by part of the metrological scientific community. As a consequence of these corrections, a detailed study of the uncertainties associated to the method, critical analysis of the instrumentation used and the presentation of measurements of parameters obtained for several radionuclides was done aiming at the completeness of the study presented in this manuscript.