Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System
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...
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Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)
2021-04-01
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| Series: | Brazilian Journal of Radiation Sciences |
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| Online Access: | https://bjrs.org.br/revista/index.php/REVISTA/article/view/1512 |
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| author | Marina Fallone Koskinas Marina Fallone Koskinas Maria Kuznetsova Denise Moreira S. Moreira Roberto M. Shoueri Ione M. Yamazaki Thales S. L. Morais Renato Semmler Mauro S. Dias |
| author_facet | Marina Fallone Koskinas Marina Fallone Koskinas Maria Kuznetsova Denise Moreira S. Moreira Roberto M. Shoueri Ione M. Yamazaki Thales S. L. Morais Renato Semmler Mauro S. Dias |
| author_sort | Marina Fallone Koskinas |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-918c8bbfab9342a5b944983a71374abd |
| institution | DOAJ |
| issn | 2319-0612 |
| language | English |
| publishDate | 2021-04-01 |
| publisher | Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR) |
| record_format | Article |
| series | Brazilian Journal of Radiation Sciences |
| spelling | doaj-art-918c8bbfab9342a5b944983a71374abd2025-08-20T03:13:32ZengBrazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)Brazilian Journal of Radiation Sciences2319-06122021-04-0191A10.15392/bjrs.v9i1A.15121171Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter SystemMarina Fallone Koskinas0Marina Fallone Koskinas1Maria Kuznetsova2Denise Moreira S. Moreira3Roberto M. Shoueri4Ione M. Yamazaki5Thales S. L. Morais6Renato Semmler7Mauro S. Dias8Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SPInstituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SPInstituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SPInstituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SPInstituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SPInstituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SPInstituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SPInstituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SPInstituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SPThe 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.https://bjrs.org.br/revista/index.php/REVISTA/article/view/1512carbon-14liquid scintillationtracer techniquetdcr. |
| spellingShingle | Marina Fallone Koskinas Marina Fallone Koskinas Maria Kuznetsova Denise Moreira S. Moreira Roberto M. Shoueri Ione M. Yamazaki Thales S. L. Morais Renato Semmler Mauro S. Dias Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System Brazilian Journal of Radiation Sciences carbon-14 liquid scintillation tracer technique tdcr. |
| title | Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System |
| title_full | Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System |
| title_fullStr | Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System |
| title_full_unstemmed | Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System |
| title_short | Preliminary measurements using a Triple to Double Coincidence Ratio (TDCR) Liquid Scintillator Counter System |
| title_sort | preliminary measurements using a triple to double coincidence ratio tdcr liquid scintillator counter system |
| topic | carbon-14 liquid scintillation tracer technique tdcr. |
| url | https://bjrs.org.br/revista/index.php/REVISTA/article/view/1512 |
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