Lung counting with a highly segmented HPGe detector

IF 1.6 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Applied Radiation and Isotopes Pub Date : 2024-07-20 DOI:10.1016/j.apradiso.2024.111452

引用次数: 0

Abstract

A highly segmented High-Purity Germanium (HPGe) detector was used to measure ²⁴¹Am activity located inside the lungs of an anthropomorphic phantom with various active and passive shield configurations. It was found that the background suppression shield does not play a significant role in reducing the Minimum Detectable Activity (MDA) after veto, based on the segmentation in the depth direction of the HPGe, when measuring low-energy gamma rays. A reduction of up to 57% in the MDA was achieved. The MDA could be further improved by a thinner lateral segmentation and an optimized anti-Compton shield coupled with an active or passive backplate. The new detector application would be particularly useful in mobile whole-body counting units, where the natural background radiation poses a challenge when measuring low-energy gamma rays.

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使用高度细分的 HPGe 探测器进行肺部计数。

利用高度分段的高纯锗（HPGe）探测器测量了拟人模型肺内的 241Am 放射性活度，并采用了不同的主动和被动屏蔽配置。研究发现，在测量低能量伽马射线时，根据 HPGe 深度方向的分割，背景抑制屏蔽在否决后降低最小可探测放射性（MDA）方面作用不大。MDA 降低了 57%。通过更薄的横向分割和优化的反康普顿屏蔽以及主动或被动背板，可以进一步提高 MDA。新探测器在移动式全身计数装置中的应用将特别有用，因为在测量低能量伽马射线时，天然本底辐射会带来挑战。

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.