Development of multi-systems for measurement of radionuclide absolute activity

Autores/as

  • Paulo Alberto Lima da Cruz Instituto de Radioproteção e Dosimetria image/svg+xml
  • Carlos Jose da Silva Instituto de Radioproteção e Dosimetria image/svg+xml
  • Anderson Leiras Instituto de Radioproteção e Dosimetria image/svg+xml
  • Andre Luiz Lopes Quadros Instituto de Radioproteção e Dosimetria image/svg+xml
  • Johnny Rangel Instituto de Radioproteção e Dosimetria image/svg+xml
  • Akira Iwahara Instituto de Radioproteção e Dosimetria image/svg+xml

DOI:

https://doi.org/10.15392/bjrs.v9i2C.1660

Palabras clave:

TDCR, coincidence, multi-systems, radionuclide standardization, radionuclide metrology.

Resumen

The development of a multi-systems triple-to-double coincidence ratio (TDCR) and coincidence 4pb-g methods, based on liquid scintillation to radionuclide standardization is presented in this work. The adjustments of multi-systems were made using standards of 3H and 14C and 60Co. The initial stage was performing measurements of pure beta-emitters 3H, 63Ni, and 90Sr90Y standard solutions by TDCR.  The results were consistent within the standard uncertainty. Measurements will be performed with a beta-gamma 60Co in a comparison to the SIR / BIPM to assess the multi-system's performance.

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Biografía del autor/a

  • Paulo Alberto Lima da Cruz, Instituto de Radioproteção e Dosimetria
    Laboratório Nacional de Metrologia das Radiações Ionizantes
  • Carlos Jose da Silva, Instituto de Radioproteção e Dosimetria
    Laboratório Nacional de Metrologia das Radiações Ionizantes
  • Anderson Leiras, Instituto de Radioproteção e Dosimetria
    Laboratório Nacional de Metrologia das Radiações Ionizantes
  • Andre Luiz Lopes Quadros, Instituto de Radioproteção e Dosimetria
    Laboratório Nacional de Metrologia das Radiações Ionizantes
  • Johnny Rangel, Instituto de Radioproteção e Dosimetria
    Laboratório Nacional de Metrologia das Radiações Ionizantes
  • Akira Iwahara, Instituto de Radioproteção e Dosimetria
    Laboratório Nacional de Metrologia das Radiações Ionizantes

Referencias

KEIGHTLEY, J., PARK, T. S. Digital coincidence counting for radionuclide standardization. Metrologia 44, 2007, p. 32–35.

YUAN, D. ET AL. Digital Coincidence System for beta-gamma Coincidence Counting. Nu-clear Physics A, Volume 834, 2010, p. 773c–776.

BRODA, R. AND POCHWALSKI K. The enhanced triple to double coincidence ratio (ETDCR) method for standardization of radionuclide by liquid scintillation counting. Nucl. Instrum. Methods, 1992, A 312, p. 85 – 89.

ZIMMERMAN, B. E. COLLE, R. AND CESSNA, J. T. Construction and implementation of the NIST triple-to-double coincidence ratio (TDCR) spectrometer, Applied Radiation and Isotopes 60, Issues 2–4, 2004, p. 433 – 438.

MÜLLER, J. W., ET AL. Report 52. Journal of the ICRU 1, 1994.

KAWADA, Y. Extended applications and improvement of the 4 coincidence method in the standardization of radionuclides. Electrotechnical Lab., 1972, Tokyo.

BAERG, A. P. Measurement of radioactive disintegration rate by the coincidence method. Metrologia, 1966, v. 2, n. 1, p. 23.

KNOLL, G. F. Radiation Detection and Measurement. Second Edition, John Wiley & Sons, 1989.

MALONDA, G. Modelos de Parâmetro Libre en Centelleo Liquido. Editorial CIEMAT, 1995.

BIRKS, J. B. Scintillations from Organic Crystals Specific Fluorescence and Relative Response of Different Radiations, Proc. Phys. Soc. London, 1951, Sect. A64, 874.

CASSETTE, P. Program TDCR07c: Program TDCR and tracer methods in LSC. LNHB-CEA/LIST, 2007, France.

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Publicado

2021-08-08

Número

Sección

Congresso Brasileiro de Metrologia das Radiações Ionizantes - CBMRI 2020

Cómo citar

Development of multi-systems for measurement of radionuclide absolute activity. Brazilian Journal of Radiation Sciences (BJRS), Rio de Janeiro, Brazil, v. 9, n. 2C (Suppl.), 2021. DOI: 10.15392/bjrs.v9i2C.1660. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/1660. Acesso em: 17 jul. 2025.