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Published on: March 11, 2021
Assessment of the neutron radiation field with activation foils and intermittent irradiations around a PETtrace
J A Benavente-Castillo1, M A S Lacerda2, A V Ferreira2
1Departamento de Engenharia Nuclear, DEN, Programa de Pós-graduação em Ciências e Técnicas Nucleares, Universidade Federal de Minas Gerais, UFMG, Av. Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil; Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil.
Abstract:
This work aimed at assessing the neutron radiation field with activation foils around of the PETtrace biomedical cyclotron. Activation foils of gold, gold covered with cadmium, indium and nickel was used to evaluate the thermal, epithermal and fast neutron contributions, respectively. The irradiations of the activation foils were performed using the intermittent irradiation method to conciliate the measurements with the routine 18F production. The evaluated points showed the contributions of the thermal, epithermal and fast neutrons due to interaction with the vault room, cyclotron accelerator and main cyclotron components.
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