A simplified γ-γ coincidence method to measure the activity of radionuclide

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2025-02-21 DOI:10.1016/j.radmeas.2025.107412

Qiankun Shao , Qingjun Zhu , Jia Li , Songlin Liu

引用次数: 0

Abstract

A simplified γ-γ coincidence method for activity measurement when a sample containing multiple γ-ray emitters is proposed. This method can be applied when a γ-γ cascade process occurs in the radionuclide of low detection efficiency. And the activity can be calculated from the full-energy peak count rate of the cascade particles in each detector and the corresponding full-energy-full-energy coincidence count rate. To verify this simplified method, it was compared with numerous γ-γ coincidence methods using Monte Carlo simulation. Limitations and applicability of these methods are discussed. In addition, to validate this method in real environments, a digital coincidence measurement system using two NaI(Tl) detectors was developed. The measurements were performed on a standardized ⁶⁰Co source and a standardized ⁶⁰Co source in the presence of a¹³⁷Cs standardized source.

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一种测量放射性核素活度的简化γ-γ符合法

提出了一种简化的γ-γ符合法，用于样品中含有多个γ射线发射体时的活度测量。该方法适用于低探测效率的放射性核素中发生γ-γ级联过程的情况。活度可由各探测器中级联粒子的全能峰值计数率和相应的全能-全能重合计数率计算得到。为了验证这种简化的方法，用蒙特卡罗模拟将其与许多γ-γ符合方法进行了比较。讨论了这些方法的局限性和适用性。此外，为了在实际环境中验证该方法，开发了一个使用两个NaI（Tl）探测器的数字符合测量系统。测量在一个标准60Co源和一个标准60Co源上进行，其中存在一个137cs标准源。

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 Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.