Activity determination of a 201Tl solution by 4πβ-γ and sum-peak coincidence methods

8th Brazilian Congress on Metrology

Ruzzarin, A.^1 ; Da Silva, M.A.L.^2 ; Iwahara, A.^3 ; Da Silva, R.L.^3 ; Filho, O.L.T.^3 ; Poledna, R.^3 ; Lopes, R.T.^1

Laboratório de Instrumentação Nuclear, Programa de Engenharia Nuclear, Instituto Alberto Luiz Coimbra de Pós-Graduação em Pesquisa de Engenharia, Universidade Federal Do Rio de Janeiro (LIN/PEN/COPPE/UFRJ), Rio de Janeiro

CEP 21945-972, Brazil^1

Comissão National de Energia Nuclear (CNEN), Rua General Severiano 90, Botafogo, Rio de Janeiro

CEP 22294-900, Brazil^2

Laboratório National de Metrologia das Radiações Ionizantes, Instituto de Radioproteção e Dosimetria/Comissão National de Energia Nuclear, Av. Salvador Allende s/no, Barra da Tijuca, Rio de Janeiro

CEP 22783-127, Brazil^3

关键词: Activity concentration;    Activity measurements;    Cardiac imaging;    Cardiac muscles;    Planar germanium detector;    Radioactive impurities;    Radioactive solution;    Reference source;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/733/1/012082/pdf
DOI  :  10.1088/1742-6596/733/1/012082

来源: IOP

【 摘 要 】

201Tl is used in nuclear medicine in cardiac imaging for evaluating the injury level in cardiac muscle at rest and exercise. In this work the activity concentration of a201Tl radioactive solution has been absolutely determined using the 4πβ-γ coincidence and sum-peak coincidence methods. The presence of202Tl radioactive impurity that imposes some difficult in the activity measurements was taken into account in the measurements. In the sum-peak method a planar germanium detector was used. The half-lives were evaluated by the reference source method and the results obtained were (3.033 ± 0.004) d and (12.320 ± 0.163) d, respectively, for201Tl and202Tl.