Pile-up correction for coincidence counting using a CAEN 1724 digitizer
In conventional gamma-ray spectrometry, the probability of pile-up effects is considered to be proportional to the dead-time, and is usually neglected for low dead-times (below 4-5%). In gamma-gamma coincidence spectrometry, though, while the dead time takes into account only events that are actuall...
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Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)
2019-02-01
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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/578 |
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| _version_ | 1849317803405869056 |
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| author | Guilherme Soares Zahn Iberê Souza Ribeiro Jr Frederico Antonio Genezini |
| author_facet | Guilherme Soares Zahn Iberê Souza Ribeiro Jr Frederico Antonio Genezini |
| author_sort | Guilherme Soares Zahn |
| collection | DOAJ |
| description | In conventional gamma-ray spectrometry, the probability of pile-up effects is considered to be proportional to the dead-time, and is usually neglected for low dead-times (below 4-5%). In gamma-gamma coincidence spectrometry, though, while the dead time takes into account only events that are actually digitized, the pile-up effects are proportional to the actual gamma-ray detection rate in each detector, not only to the ones that trigger the coincidence gate. Thus, the pile-up corrections may not be so easy to assess as in single spectrometry systems. In this work, a system composed of two HPGe detectors coupled to a CAEN v1724 digitizer is studied. A 3kBq 60Co source was analyzed, both alone and in the presence of other radioactive sources (137Cs, 133Ba and 152Eu), and the resulting coincidence peak areas were compared to assess the effectiveness of two distinct corrections: a simple normalization by the live time of acquisition and the normalization by the count rate obtained using a pulse generator. The results obtained stress the need to use the pulse generator in this specific setup in order to get accurate results. |
| format | Article |
| id | doaj-art-4fb0f2a658d04cdf8636a299db38b868 |
| institution | Kabale University |
| issn | 2319-0612 |
| language | English |
| publishDate | 2019-02-01 |
| publisher | Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR) |
| record_format | Article |
| series | Brazilian Journal of Radiation Sciences |
| spelling | doaj-art-4fb0f2a658d04cdf8636a299db38b8682025-08-20T03:51:04ZengBrazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)Brazilian Journal of Radiation Sciences2319-06122019-02-0172A (Suppl.)10.15392/bjrs.v7i2A.578439Pile-up correction for coincidence counting using a CAEN 1724 digitizerGuilherme Soares Zahn0Iberê Souza Ribeiro Jr1Frederico Antonio Genezini2Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP)Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP)Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP)In conventional gamma-ray spectrometry, the probability of pile-up effects is considered to be proportional to the dead-time, and is usually neglected for low dead-times (below 4-5%). In gamma-gamma coincidence spectrometry, though, while the dead time takes into account only events that are actually digitized, the pile-up effects are proportional to the actual gamma-ray detection rate in each detector, not only to the ones that trigger the coincidence gate. Thus, the pile-up corrections may not be so easy to assess as in single spectrometry systems. In this work, a system composed of two HPGe detectors coupled to a CAEN v1724 digitizer is studied. A 3kBq 60Co source was analyzed, both alone and in the presence of other radioactive sources (137Cs, 133Ba and 152Eu), and the resulting coincidence peak areas were compared to assess the effectiveness of two distinct corrections: a simple normalization by the live time of acquisition and the normalization by the count rate obtained using a pulse generator. The results obtained stress the need to use the pulse generator in this specific setup in order to get accurate results.https://bjrs.org.br/revista/index.php/REVISTA/article/view/578caen 1724pile-up correctioncoincidence |
| spellingShingle | Guilherme Soares Zahn Iberê Souza Ribeiro Jr Frederico Antonio Genezini Pile-up correction for coincidence counting using a CAEN 1724 digitizer Brazilian Journal of Radiation Sciences caen 1724 pile-up correction coincidence |
| title | Pile-up correction for coincidence counting using a CAEN 1724 digitizer |
| title_full | Pile-up correction for coincidence counting using a CAEN 1724 digitizer |
| title_fullStr | Pile-up correction for coincidence counting using a CAEN 1724 digitizer |
| title_full_unstemmed | Pile-up correction for coincidence counting using a CAEN 1724 digitizer |
| title_short | Pile-up correction for coincidence counting using a CAEN 1724 digitizer |
| title_sort | pile up correction for coincidence counting using a caen 1724 digitizer |
| topic | caen 1724 pile-up correction coincidence |
| url | https://bjrs.org.br/revista/index.php/REVISTA/article/view/578 |
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