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Browsing 4. Congresso Brasileiro de Metrologia das Radiações Ionizantes (CBMRI) by Author "Iwahara, Akira"

Browsing 4. Congresso Brasileiro de Metrologia das Radiações Ionizantes (CBMRI) by Author "Iwahara, Akira"

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  • 65Zn and 133Ba standardizing by photon-photon coincidence counting 
    Cruz, Paulo Alberto Lima da; Loureiro, Jamir dos Santos; Iwahara, Akira; Delgado, José Ubiratan; Lopes, Ricardo Tadeu (2017)
    The LNMRI/Brazil has deployed a system using X-gamma coincidence technique for the standardizing radionuclide, which present simple and complex decay scheme with X-rays of energy below 100 keV. The work was carried on ...
  • 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 ...
  • Primary standardization of 152Eu by 4πβ(LS) – γ (NaI) coincidence counting and CIEMAT-NIST method 
    Ruzzarin, Anelise; Cruz, Paulo Alberto Lima da; Ferreira Filho, Alfredo Lopes; Iwahara, Akira (2017)
    The 4πβ-γ coincidence counting and CIEMAT/NIST liquid scintillation method were used in the standardization of a solution of 152Eu. In CIEMAT/NIST method, measurements were performed in a Liquid Scintillation Counter model ...
  • 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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