Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System

Authors

  • Marina Fallone Koskinas Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP
  • Marina Fallone Koskinas Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP
  • Maria Kuznetsova Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP
  • Denise Moreira S. Moreira Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP
  • Roberto M. Shoueri Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP
  • Ione M. Yamazaki Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP
  • Thales S. L. Morais Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP
  • Renato Semmler Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP
  • Mauro S. Dias Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

DOI:

https://doi.org/10.15392/bjrs.v9i1A.1512

Keywords:

Carbon-14, Liquid scintillation, Tracer technique, TDCR.

Abstract

The preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System developed by the Nuclear Metrology Laboratory (LMN) at IPEN, is presented. The TDCR system makes use of three photomultipliers positioned at 120° relative angle, operating in coincidence. For this preliminarymeasurement, 14C was selected to be standardized; 14C was chosen due to be a pure beta emitter with low end-point energy of 156 keV, which is suitable to be measured by the TDCR system. This solution was previously calibrated by the efficiency tracing technique using a 4p(PC)b-g coincidence system, employing 60Co as a tracer. The activity of the 14C solution by efficiency tracing technique was determined by using the extrapolation technique, changing the beta efficiency by pulse height discrimination. In order to determine the final activity, a Monte Carlo simulation was used to generate the extrapolation curve. The Software Coincidence System (SCS) developed by the LMN was used for both systems to register the events. MICELLE 2 code was used to calculate the theoretical TDCR efficiency. Measurements using HIDEX, a commercial liquid scintillator system, were also carried out and the results from the three methods were compared, showing a good agreement.

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Author Biographies

Marina Fallone Koskinas, Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

Centro do Reator de Pesquisas - CERPQ

Marina Fallone Koskinas, Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

Centro do Reator de Pesquisas - CERPQ

Maria Kuznetsova, Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

Centro do Reator de Pesquisas - CERPQ

Denise Moreira S. Moreira, Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

Centro do Reator de Pesquisas - CERPQ

Roberto M. Shoueri, Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

Centro do Reator de Pesquisas - CERPQ

Ione M. Yamazaki, Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

Centro do Reator de Pesquisas - CERPQ

Thales S. L. Morais, Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

Centro do Reator de Pesquisas - CERPQ

Renato Semmler, Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

Centro do Reator de Pesquisas - CERPQ

Mauro S. Dias, Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP

Centro do Reator de Pesquisas - CERPQ

References

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Published

2021-04-30

How to Cite

Koskinas, M. F., Koskinas, M. F., Kuznetsova, M., Moreira, D. . M. S., Shoueri, R. M., Yamazaki, I. M., Morais, T. S. L., Semmler, R., & Dias, M. S. (2021). Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System. Brazilian Journal of Radiation Sciences, 9(1A). https://doi.org/10.15392/bjrs.v9i1A.1512

Issue

Section

The Meeting on Nuclear Applications (ENAN) 2019

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