Closed-loop method for accurate measurement of Rn-220 exhalation rate from soil surfaces

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL Radiation Physics and Chemistry Pub Date : 2025-01-22 DOI:10.1016/j.radphyschem.2025.112561

Xianfa Mao, Zhongkai Fan, Shuaibin Liu, Ruomei Xie, Shuai Yuan, Huiying Li, Jiale Sun, Jiulin Wu, Haibo Yi, Zhipeng Liu, Xinyue Yang, Shicheng Luo, Chenxi Zu, Feng Xiao, Hongbo Xu, Hongzhi Yuan, Yanliang Tan

{"title":"Closed-loop method for accurate measurement of Rn-220 exhalation rate from soil surfaces","authors":"Xianfa Mao, Zhongkai Fan, Shuaibin Liu, Ruomei Xie, Shuai Yuan, Huiying Li, Jiale Sun, Jiulin Wu, Haibo Yi, Zhipeng Liu, Xinyue Yang, Shicheng Luo, Chenxi Zu, Feng Xiao, Hongbo Xu, Hongzhi Yuan, Yanliang Tan","doi":"10.1016/j.radphyschem.2025.112561","DOIUrl":null,"url":null,"abstract":"Rn-220 is an important isotope of radon. The relatively short half-life of Rn-220 presents a significant challenge in accurately determining its exhalation rate. As the risk of exposure to Rn-220 continues to rise, the accurate measurement of Rn-220 and its exhalation rate has become a significant challenge in the field of radiation protection. Traditional model only considers the change of Rn-220 concentration in the accumulation chamber. The influence of outflow, inflow and decay of Rn-220 at the inlet and outlet of the accumulation chamber on the concentration of Rn-220 in the accumulation chamber is not considered. Therefore, the actual Rn-220 exhalation rate is difficult to accurately reflect. In this paper, a new Rn-220 exhalation model was proposed. Considering the change of Rn-220 concentration at the inlet and outlet of the accumulation chamber, the theoretical model was established between Rn-220 from the accumulation chamber to the inner chamber of RAD7 and back to the accumulation chamber. Verified through three sets of experiments, the model more accurately reflects the accumulation and decay process of Rn-220 in the closed-loop system, compared to the traditional model, the new model improves the measurement reliability from the theoretical perspective, with an enhancement of 16.15%. This new model offers a precise means of measuring Rn-220 exhalation rates from soil surfaces.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"45 1","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiation Physics and Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1016/j.radphyschem.2025.112561","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Rn-220 is an important isotope of radon. The relatively short half-life of Rn-220 presents a significant challenge in accurately determining its exhalation rate. As the risk of exposure to Rn-220 continues to rise, the accurate measurement of Rn-220 and its exhalation rate has become a significant challenge in the field of radiation protection. Traditional model only considers the change of Rn-220 concentration in the accumulation chamber. The influence of outflow, inflow and decay of Rn-220 at the inlet and outlet of the accumulation chamber on the concentration of Rn-220 in the accumulation chamber is not considered. Therefore, the actual Rn-220 exhalation rate is difficult to accurately reflect. In this paper, a new Rn-220 exhalation model was proposed. Considering the change of Rn-220 concentration at the inlet and outlet of the accumulation chamber, the theoretical model was established between Rn-220 from the accumulation chamber to the inner chamber of RAD7 and back to the accumulation chamber. Verified through three sets of experiments, the model more accurately reflects the accumulation and decay process of Rn-220 in the closed-loop system, compared to the traditional model, the new model improves the measurement reliability from the theoretical perspective, with an enhancement of 16.15%. This new model offers a precise means of measuring Rn-220 exhalation rates from soil surfaces.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

求助全文

约1分钟内获得全文去求助

来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. 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. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.