{"title":"A simplified γ-γ coincidence method to measure the activity of radionuclide","authors":"Qiankun Shao , Qingjun Zhu , Jia Li , Songlin Liu","doi":"10.1016/j.radmeas.2025.107412","DOIUrl":null,"url":null,"abstract":"<div><div>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 <sup>60</sup>Co source and a standardized <sup>60</sup>Co source in the presence of a<sup>137</sup>Cs standardized source.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"183 ","pages":"Article 107412"},"PeriodicalIF":1.6000,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiation Measurements","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1350448725000411","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
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.
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.
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