Design of a new Compton-TDCR spectrometer at Sofia University for the characterization of Liquid Scintillation cocktails

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

Applied Radiation and Isotopes Pub Date : 2025-09-23 DOI:10.1016/j.apradiso.2025.112194

V. Todorov , P. Cassette , V. Jordanov , S. Ivanov , H. Stoycheva , S. Georgiev , B. Sabot , K. Mitev

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Abstract

This work presents the development of a new Compton-TDCR spectrometer at Sofia University for studying the non-linearity of liquid scintillation cocktails. The TDCR counter is equipped with Hamamatsu R331-05 photomultiplier tubes (PMTs), and its performance was compared with the performance of three other TDCR counters operated at Sofia University. Efficiency variation technique is used to evaluate the kB parameter and to calculate the activity of ³H and ¹⁴C sources. The comparison between the counters demonstrates excellent performance of the newly developed system. The Compton channel of the new system uses a high resolution n-type germanium detector, which ensures high accuracy in the Compton electron energy. Results from Monte Carlo (MC) simulations investigating the source collimation and the spectrum in the gamma detector are presented. Birk’s ionization quenching formula was fitted to the experimental data, and the obtained kB value shows good agreement with the kB determined by the efficiency variation technique.

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索非亚大学新型液体闪烁鸡尾酒表征康普顿- tdcr光谱仪的设计

本文介绍了索非亚大学用于研究液体闪烁鸡尾酒非线性的新型康普顿- tdcr光谱仪的研制。TDCR计数器配备了滨松R331-05光电倍增管（pmt），并将其性能与索非亚大学运行的其他三个TDCR计数器的性能进行了比较。利用效率变化技术对kB参数进行了评价，并计算了3H和14C源的活度。通过对计数器的比较，证明了新开发系统的优良性能。新系统的康普顿通道采用高分辨率n型锗探测器，保证了康普顿电子能量的高精度。本文给出了用蒙特卡罗（MC）模拟研究伽玛探测器源准直和光谱的结果。将Birk电离猝灭公式与实验数据拟合，所得kB值与效率变分法测定的kB值吻合较好。

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.