Evaluation of the Response Function of NaI (Tl) and Plastic Scintillator with Temperature Fluctuations

IF 0.4 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI:10.1134/s0020441224700313

S. Z. Islami rad, R. Gholipour Peyvandi, S. Ghanavati

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Abstract

The temperature effect plays an important role in the response function and efficiency of detectors. In this study, the behavior of doped NaI (Tl) and plastic scintillators was evaluated and compared with temperature changes, in a similar condition, for the first time. The detection system uses an experimental setup consisting of a ⁶⁰Co source, NaI (Tl) detector, and a plastic scintillation detector. The results show that the recorded count rates from NaI (Tl) detector have a direct relation with temperature and lead to a 0.15%/°C error in the count rate. But in the same condition, the acquired count rates from the plastic scintillator detector were reduced with temperature increasing with a 0.57%/°C error in the count rate (inverse relation). Also, in this work, Linear and second-order polynomial regression were implemented on the recorded count rates from scintillators to compensate temperature effect. Finally, the acquired results were evaluated using the relative error (%) and diagram slope which expressed the superiority of the polynomial regression. Using this correction technique, the count rate changes reached to least and are stable with temperature fluctuations. The results of this research can be suitable for the industrial application of NaI (Tl) and plastic scintillators in level gauging, thickness gauging, and other nuclear gauging systems.

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评估 NaI (Tl) 和塑料闪烁体对温度波动的响应函数

摘要温度效应对探测器的响应功能和效率起着重要作用。本研究首次在类似条件下对掺杂 NaI（Tl）和塑料闪烁体的行为进行了评估和温度变化比较。检测系统使用的实验装置由 60Co 源、NaI（Tl）检测器和塑料闪烁检测器组成。结果表明，NaI（Tl）探测器记录的计数率与温度有直接关系，导致计数率误差为 0.15%/°C。但在相同条件下，塑料闪烁体探测器获得的计数率随温度升高而降低，计数率误差为 0.57%/°C（反比关系）。在这项工作中，还对闪烁体记录的计数率进行了线性和二阶多项式回归，以补偿温度效应。最后，使用表示多项式回归优越性的相对误差（%）和图表斜率对获得的结果进行评估。使用这种校正技术，计数率的变化达到了最小值，并在温度波动时保持稳定。这项研究成果适用于将 NaI (Tl) 和塑料闪烁体用于液位测量、厚度测量和其他核测量系统的工业应用。

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来源期刊

Instruments and Experimental Techniques 工程技术-工程：综合

CiteScore

1.20

自引率

33.30%

发文量

113

审稿时长

4-8 weeks

期刊介绍： Instruments and Experimental Techniques is an international peer reviewed journal that publishes reviews describing advanced methods for physical measurements and techniques and original articles that present techniques for physical measurements, principles of operation, design, methods of application, and analysis of the operation of physical instruments used in all fields of experimental physics and when conducting measurements using physical methods and instruments in astronomy, natural sciences, chemistry, biology, medicine, and ecology.