Pereira W W, Estrada J J S, Patrão K C S, Alves C F E, Magalhães L A G, Leite S P
Laboratório Nacional de Metrologia das Radiações Ionizantes LNMRI/IRD, Av. Salvador Allende, s/n, Barra da Tijuca, Rio de Janeiro, RJ, Brazil.
Fundação Técnico Educacional Souza Marques, FTESM, Av. Ernani Cardoso, 335, Cascadura, Rio de Janeiro, RJ, Brazil.
Radiat Prot Dosimetry. 2018 Aug 1;180(1-4):29-32. doi: 10.1093/rpd/ncx238.
The Laboratório de Ciências Radiológicas is developing an irradiator for neutron survey meters calibration. Part of this work is related to the characterization of the neutron source that will be used in the irradiator. Therefore, a source of 241Am-Be(α,n) was characterized according to the following attributes: neutron energy distribution, anisotropy and emission rate. In order to make these values into high-level metrological references traceable by the Bureau International des Poids et Mesures, these measurements were taken at the Neutron Laboratory part of the Laboratório Nacional de Metrologia das Radiações Ionizantes. Results obtained for the source spectrum have strong adherence to the reference spectrum established by ISO 8529-1. The new laboratory for neutron calibration will allow calibration in an approximate ambient dose equivalent ranging 20-4500 μSv/h.
放射科学实验室正在开发一种用于中子测量仪校准的辐照器。这项工作的一部分与辐照器中将要使用的中子源的特性描述有关。因此，根据以下属性对241Am-Be（α，n）源进行了特性描述：中子能量分布、各向异性和发射率。为了使这些值成为国际计量局可追溯的高级计量参考，这些测量是在国家电离辐射计量实验室的中子实验室进行的。源光谱获得的结果与ISO 8529-1建立的参考光谱有很强的一致性。新的中子校准实验室将允许在20-4500μSv/h的近似环境剂量当量范围内进行校准。
