Study of a method to correct for accidental coincidences in TDCR measurements

IF 1.8 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Applied Radiation and Isotopes Pub Date : 2025-09-10 DOI:10.1016/j.apradiso.2025.112176

Karsten Kossert, Marcell Péter Takács

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引用次数: 0

Abstract

A recently proposed method from Dutsov et al. (2020) for correcting random coincidences in TDCR measurements was thoroughly examined. To achieve this, an extensive experimental study was conducted using various liquid scintillation (LS) samples. The study involved several radionuclides (³H, ³²Si/³²P, ⁵⁵Fe, ⁸⁹Sr, ¹⁵¹Sm, ²³⁸Pu, and ²⁴¹Am) as well as background samples. Different LS cocktails and activity levels were also considered. Data acquisition was performed using a fast digitizer, and the resulting list-mode data were analyzed by systematically varying the coincidence resolving time over a range from 10 ns to 1500 ns. All data were evaluated both with and without correction for random coincidences.

In all cases, the measurement results exhibited significantly better consistency when the correction for random coincidences was applied. This also holds for background measurements. The improvement was particularly evident at longer coincidence resolving times. Moreover, it is demonstrated that the correction is essential for accurately evaluating uncertainties.

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TDCR测量中偶然巧合校正方法的研究

Dutsov等人（2020）最近提出的一种校正TDCR测量随机巧合的方法进行了彻底的检验。为了实现这一点，使用各种液体闪烁（LS）样品进行了广泛的实验研究。该研究涉及几种放射性核素（3H、32Si/32P、55Fe、89Sr、151Sm、238Pu和241Am）以及背景样品。还考虑了不同的LS鸡尾酒和活动水平。使用快速数字化仪进行数据采集，并通过在10 ns到1500 ns的范围内系统地改变符合解析时间来分析得到的列表模式数据。对所有数据进行评估，不论是否对随机巧合进行校正。在所有情况下，当应用随机巧合校正时，测量结果显示出明显更好的一致性。这也适用于背景测量。在较长的巧合解析时间下，这种改善尤为明显。此外，还证明了校正对于准确评估不确定性是必不可少的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.