True-coincidence-summing corrections of natural and artificial radionuclides for Mazinger, the very low background and high-efficiency gamma-ray spectrometer, using Monte Carlo simulations with Geant4

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

Applied Radiation and Isotopes Pub Date : 2025-09-12 DOI:10.1016/j.apradiso.2025.112173

D. Romero-Fuentes, R. Rivas-Gómez, B. Quintana-Arnés

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引用次数: 0

Abstract

The development of very low background γ-ray spectrometers has led to multidetector systems, such as Mazinger. Mazinger is an array of two HPGe detectors and two NaI(Tl) anti-Compton rings in anticoincidence configuration. The detector shielding combines passive shielding, composed of three layers of iron, lead and copper and active shielding, consisting of two anti-muon veto detectors in addition to the previously mentioned anti-Compton rings. High efficiency and background reduction are achieved for low-level activity measurements, approaching the limit of the technique. However, true-coincidence-summing (TCS) effects become a drawback in Mazinger due to its specific anticoincidence configuration. This occurs because any simultaneous triggering of more than one of the four detectors within the coincidence window results in the event being rejected. Following the implementation of Mazinger in the Monte Carlo simulations with Geant4, TCS correction factors were calculated, reaching values as high as 1200 % in some cases. This work presents the successful results obtained for both natural and artificial multi-γ-emitting radionuclides, including ²²⁸Ac, ¹³³Ba, ²¹⁴Bi, ¹³⁹Ce, ¹³⁴Cs, ⁶⁰Co, ¹⁵²Eu, and ²⁰⁹Tl.

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使用genant4的蒙特卡罗模拟，对极低本底和高效率伽马射线光谱仪Mazinger的天然和人工放射性核素的真巧合和修正。

极低本底γ射线能谱仪的发展导致了多探测器系统的出现，如Mazinger。Mazinger是一个由两个HPGe探测器和两个反巧合结构的NaI（Tl）反康普顿环组成的阵列。探测器屏蔽结合了由三层铁、铅和铜组成的被动屏蔽和除前面提到的反康普顿环外由两个反μ子否决权探测器组成的主动屏蔽。低水平活动测量达到了高效率和背景降低，接近该技术的极限。然而，真重合求和（TCS）效应由于其特定的反重合结构而成为Mazinger的一个缺点。这是因为在符合窗口内同时触发四个探测器中的一个以上会导致事件被拒绝。使用Geant4在蒙特卡罗模拟中实现Mazinger后，计算了TCS校正因子，在某些情况下达到高达1200%的值。本文介绍了天然和人工多γ辐射核素的成功结果，包括228Ac、133Ba、214Bi、139Ce、134Cs、60Co、152Eu和209Tl。

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.