Metrological Measurement of 99mTc Half-life Radionuclide by Germanium Detector

2014 Joint IMEKO TC1-TC7-TC13 Symposium: Measurement Science Behind Safety and Security

Da Silva, R.L.^1 ; Delgado, J.U.^1 ; Poledna, R.^1 ; Alves, R.N.^2 ; De Almeida, M.C.M.^2,3

Laboratório Nacional de Metrologia das Radiações Ionizantes- LNMRI/IRD/CNEN, Av. Salvador Allende, Rio de Janeiro

CEP 22780-160, Brazil^1

Seção Engenharia Nuclear, IME, Pça Gen Tibúrcio 80, Rio de Janeiro

CEP 22290-270, Brazil^2

Dinor, Comissão Nacional de Energia Nuclear(CNEN), Rua General Severiano 82, Botafogo, Rio de Janeiro, Brazil^3

关键词: Gamma spectrometry;    Ge detectors;    Germanium detector;    Half lives;    Measurements of;    Related impurities;    Total uncertainties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/588/1/012047/pdf
DOI  :  10.1088/1742-6596/588/1/012047

来源: IOP

【 摘 要 】

An approach for half-life determination using gamma spectrometry with Ge detector is presented. This measurement reduces the contribution of the type B component on the total uncertainty. The independence of the method with respect to the instrumental interferences or radiochemical impurities was evidenced. The method shows no limitations for the measurements of samples containing a genetically related impurity of concentrations below than 3% with the same energy or very close to the one of the radionuclide to be measured, e.g.,99Mo in a99mTc sample. The results of half-lives are in good agreement with the literature and the associated uncertainties lower than 0.1 %.