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Browsing 4. Congresso Brasileiro de Metrologia das Radiações Ionizantes (CBMRI) by Author "Silva, Carlos José da"

Browsing 4. Congresso Brasileiro de Metrologia das Radiações Ionizantes (CBMRI) by Author "Silva, Carlos José da"

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  • 226Ra activity standardization by 4[beta][alfa][omega](LS)-[gama](NaI-Tl) anticoincidence counting 
    Silva, Carlos José da; Poledna, Roberto; Gomes, Regio dos Santos; Santos, A. R. L. (2017)
    From a commercial supplier a solution containing 226Ra has been standardized at National Laboratory for Ionizing Radiation Metrology (LNMRI) for the first time using Liquid scintillation based measurement. The measurement ...
  • Activity measurements of 55Fe by two different methods 
    Cruz, Paulo Alberto Lima da; Iwahara, Akira; Silva, Carlos José da; Poledna, Roberto; Loureiro, Jamir dos Santos; Silva, Mônica Aguiar Leobino da; Ruzzarin, Anelise (2017)
    A calibrated germanium detector and CIEMAT/NIST liquid scintillation method were used in the standardization of solution of 55Fe coming from a keycomparison BIPM. Commercial HISAFE’3 cocktails were used in source preparation ...
  • Padronização absoluta do 65Zn pelo método de anticoincidência 4πβ-γ 
    Santos, Anderson Ricardo Leiras dos; Silva, Carlos José da; Delgado, José Ubiratan; Tavares, Desiree Yael de Sena; Silva, Ronaldo L. da; Poledna, Roberto; Iwahara, Akira (2017)
    Uma solução de 65Zn foi padronizada usando o método absoluto de contagem em anticoincidência 4πβ(LS)-γ(NaI) e técnica de extrapolação de eficiência beta pelo Laboratório Nacional de Metrologia das Radiações Ionizantes no ...
  • A study to assess the long-term stability of the ionization chamber reference system in the LNMRI 
    Trindade Filho, Octavio Luiz; Conceição, Dayana Azeredo da; Oliveira, Antonio Eduardo de; Delgado, José Ubiratan; Iwahara, Akira; Silva, Carlos José da; Tauhata, Luiz (2017)
    Ionization chambers are used as secondary standard in order to maintain the calibration factors of radionuclides in the activity measurements in metrology laboratories. Used as radionuclide calibrator in nuclear medicine ...

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