AI Article Synopsis
- The TDCR method for standardizing low-activity liquid scintillation samples can be affected by background fluctuations, increasing measurement uncertainties and the minimum detectable activity (MDA).
- A new TDCR counting system with anti-coincidence detectors was developed to minimize these background impacts by optimizing parameters based on time difference distributions.
- Tests with diluted H and C samples show that using the anti-coincidence technique reduces background noise by about 84%, which improves the accuracy of activity measurements.
Article Abstract
When employing the TDCR method for standardization of low-activity liquid scintillation samples, fluctuations in system background can significantly impact both measurement uncertainties and minimum detectable activity (MDA). To mitigate this impact, a TDCR counting system with anti-coincidence detectors was developed. By analyzing the time difference distribution spectrum between the anti-coincidence channel and β channel, optimal parameters for the anti-coincidence module are determined. The objective of the study is to enhance the effectiveness of the anti-coincidence technique while minimizing the removal of real events. Finally, two sets of H and C samples with known activities of around 1 Bq are prepared via dilution to validate the performance of the system. Compared to without anti-coincidence, the background has been reduced by nearly 84%, leading to decreased fluctuations in the activity results.
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| http://dx.doi.org/10.1016/j.apradiso.2024.111537 | DOI Listing |
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