An electronic energy compensation method for flattening the energy response of SiPM-GGAG:Ce,B based gamma detector.

IF 0.8 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES Radiation protection dosimetry Pub Date : 2024-09-21 DOI:10.1093/rpd/ncae196

Saurabh Srivastava, Pratip Mitra, Amit Kumar, Sunil Singh, Mohit Tyagi, Aerattukkara Vinod Kumar, Anita Topkar

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引用次数: 0

Abstract

The energy response of gross gamma dose rate monitors needs to be flat in order to prevent overestimation of dose at low gamma energies. In this paper, a discriminator threshold modulation based electronic energy compensation algorithm has been proposed for SiPM-scintillator based gamma detectors. Theoretical simulation studies were carried out in order to optimize the parameters of the periodic ramp voltage used for modulation of the discriminator threshold of a SiPM-GGAG:Ce,B based gamma dose rate monitor. A customized threshold modulation circuit and signal processing electronics were developed for this gamma detector. For experimentally optimizing the parameters, the energy response studies of the detector, with and without the discriminator threshold modulation, were carried out. With the optimized parameters for a periodic ramp threshold, the count rates for 241Am (60 keV) and 60Co (1173 and 1332 keV) were observed to be within ±30% of the count rate obtained for 137Cs (662 keV). Using the electronic energy compensation techniques presented in this paper, a flat energy response of the SiPM-scintillator gamma detector for the energy range of 60 keV to 1.5 MeV could be achieved.

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使基于 SiPM-GGAG:Ce,B 的伽马探测器的能量响应趋于平缓的电子能量补偿方法。

伽马总剂量率监测仪的能量响应需要平缓，以防止在低伽马能量时剂量被高估。本文针对基于 SiPM 闪烁器的伽马探测器提出了一种基于鉴别器阈值调制的电子能量补偿算法。为了优化用于调制基于 SiPM-GGAG:Ce,B 的伽马剂量率监测器的鉴别器阈值的周期性斜坡电压参数，进行了理论模拟研究。为该伽马探测器开发了定制的阈值调制电路和信号处理电子装置。为了在实验中优化参数，对探测器进行了能量响应研究，包括使用和不使用鉴别器阈值调制。通过对周期性斜坡阈值参数的优化，观察到 241Am（60 千伏）和 60Co（1173 和 1332 千伏）的计数率在 137Cs（662 千伏）计数率的 ±30% 以内。利用本文介绍的电子能量补偿技术，可以实现 SiPM 闪烁器伽马探测器在 60 keV 至 1.5 MeV 能量范围内的平坦能量响应。

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

Radiation protection dosimetry 环境科学-公共卫生、环境卫生与职业卫生

CiteScore

1.40

自引率

10.00%

发文量

223

审稿时长

6-12 weeks

期刊介绍： Radiation Protection Dosimetry covers all aspects of personal and environmental dosimetry and monitoring, for both ionising and non-ionising radiations. This includes biological aspects, physical concepts, biophysical dosimetry, external and internal personal dosimetry and monitoring, environmental and workplace monitoring, accident dosimetry, and dosimetry related to the protection of patients. Particular emphasis is placed on papers covering the fundamentals of dosimetry; units, radiation quantities and conversion factors. Papers covering archaeological dating are included only if the fundamental measurement method or technique, such as thermoluminescence, has direct application to personal dosimetry measurements. Papers covering the dosimetric aspects of radon or other naturally occurring radioactive materials and low level radiation are included. Animal experiments and ecological sample measurements are not included unless there is a significant relevant content reason.