Journal of environmental radioactivity最新文献

{"title":"Spatial unfolding of an extended La-140 source within a 0.5 km-wide exclusion zone using Compton gamma imaging measurements","authors":"N.J. Murtha ,&nbsp;P.R.B. Saull ,&nbsp;L.E. Sinclair ,&nbsp;A.M.L. MacLeod ,&nbsp;A. McCann","doi":"10.1016/j.jenvrad.2024.107605","DOIUrl":"10.1016/j.jenvrad.2024.107605","url":null,"abstract":"<div><div>Results from applying an advanced spatial-unfolding technique to outdoor-trial data acquired with a <em>Silicon photomultiplier-based Compton Telescope for Safety and Security</em> (SCoTSS) gamma imager during perimeter survey of a distributed La-140 source lying within a 500 m x 500 m exclusion zone are presented. A synthetic-data version of the experiment was also modelled using Monte Carlo simulations and reconstructed. For both experimental and synthetic data the method faithfully reproduces the shape of the activity distribution, and for synthetic data the total activity is reproduced as well. However, for the experimental data the method underestimates the total activity by a factor of six. This can be accounted for by environmental snow and soil conditions not included in the detector response functions. This application of the Compton gamma imager survey-data inversion method demonstrates its applicability under austere conditions wherein extreme weather and transportation constraints severely impacted the quality of the data collected. The trial shows that the method has widespread applicability in the radiological and nuclear safety and security field, particularly for scenarios in which a threat material or contaminated area lies within a no-entry or no-fly zone.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107605"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142949984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploratory study of erosion in cultivated organic soils using cesium-137 measurements","authors":"Alexis Gloutney ,&nbsp;Claude Bernard ,&nbsp;Jacynthe Dessureault-Rompré","doi":"10.1016/j.jenvrad.2024.107574","DOIUrl":"10.1016/j.jenvrad.2024.107574","url":null,"abstract":"<div><div>Concerns about the sustainability of cultivated organic soils in Montérégie (Quebec, Canada), which can also be identified as histosols, led to this exploratory study aimed at quantifying erosion in these soils by using cesium-137 (¹³⁷Cs) measurements. Soil samples were taken from organic soils in twenty-two fields, and their ¹³⁷Cs contents were measured by gamma spectrometry. The estimated mean annual erosion rates (±SD), adjusted with cropping history, ranged from 0.4 ± 6.3 to 14.6 ± 10.7 t/ha. The results obtained are lower than expected, based on information provided by the agricultural producers from whose farms the samples were taken, as well as two studies conducted in the same study area that highlight the importance of cultivated organic soil height loss due to wind erosion. Recommendations are formulated to obtain more precise erosion rates in future research. This study also points out aspects that deserve to be investigated to adapt existing conversion models for erosion assessment using ¹³⁷Cs measurements in cultivated organic soils.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107574"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term studies on the temporal change of radiocesium in wild rodents and insectivores in Nihonmatsu City, Fukushima Prefecture, Japan","authors":"Minato Okumura ,&nbsp;Shunsuke Ikeuchi ,&nbsp;Yomogi Sato ,&nbsp;Nguyen Khanh Thuan ,&nbsp;Haruka Yanagawa ,&nbsp;Bui Thi Hien ,&nbsp;Takeshi Niwa ,&nbsp;Hideki Hayashidani","doi":"10.1016/j.jenvrad.2024.107582","DOIUrl":"10.1016/j.jenvrad.2024.107582","url":null,"abstract":"<div><div>The radiocesium (¹³⁴Cs and ¹³⁷Cs) released by the Fukushima Dai-ichi Nuclear Power Plant accident in March 2011 has a relatively long physical half-life and may remain in the natural environment for a long period of time and continue to be transferred to wildlife. In this study, we conducted a fixed-point investigation of radiocesium activity concentrations in stomach contents and skeletal muscles samples of wild rodents (<em>Apodemus speciosus</em>, <em>Apodemus argenteus</em> and <em>Microtus montebelli</em>) and insectivores (<em>Urotrichus talpoides</em>) from 2012 to 2021. Two sampling sites in Mt. Kuchibutoyama and Mt. Hayama were selected in forested areas in Fukushima Prefecture. In Mt. Kuchibutoyama, a decreasing trend in ¹³⁷Cs activity concentrations was observed for stomach contents of wild rodents and insectivores as a whole and for skeletal muscle of <em>A. speciosus</em> and <em>A. argenteus</em>. The effective half-life (T_ef) of ¹³⁷Cs activity concentration was estimated to be 7.6 years in the stomach contents, and 5.4 years and 7.4 years in skeletal muscle of <em>A. speciosus</em> and <em>A. argenteus</em>, respectively, with corresponding ecological half-life (T_ec) of 10 years in the stomach contents, and 6.6 years (<em>A. speciosus</em>) and 9.8 years (<em>A. argenteus</em>) in the skeletal muscle. In Mt. Hayama, there was a slight upward trend in the ¹³⁷Cs activity concentration in the stomach contents of wild rodents and insectivores, and no significant T_ef could be obtained. Statistically significant T_ef and T_ec could not also be estimated for ¹³⁷Cs radioactivity levels in skeletal muscle of <em>A. speciosus</em> and <em>A. argenteus</em>. These results suggest that ¹³⁷Cs concentration in insects and plants eaten by wild rodents and insectivores in Mt. Hayama has remained at a certain level for a long time. In November 2021, ¹³⁷Cs concentrations above 1.0 kBq/kg were still detected in skeletal muscle of <em>A. argenteus</em> captured in Mt. Kuchibutoyama and <em>A. speciosus</em> and <em>A. argenteus</em> captured in Mt. Hayama. It is expected that ¹³⁷Cs concentration levels in the stomach contents and skeletal muscles of these wild rodents and insectivore will remain for a long time to come, especially at Mt. Hayama. Furthermore, we also collected soil and plant samples when sampling wild rodents and insectivores in this study. It is important as a future task to study temporal changes in radiocesium activity concentrations in the habitat of wild small mammals and to examine the relationship between these changes and temporal changes in radiocesium activity concentrations in wild small mammals.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107582"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142791936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved soil-to-plant transfer factors for 99Tc and 79Se in natural and agricultural ecosystems","authors":"Eleni Siasou,&nbsp;Neil Willey","doi":"10.1016/j.jenvrad.2025.107622","DOIUrl":"10.1016/j.jenvrad.2025.107622","url":null,"abstract":"<div><div>Geological Disposal Facilities (GDFs) are the preferred option for the disposal of high- and medium-level nuclear waste but environmental assessments for GDFs are complex. Models of transfer into the biosphere for radioisotopes that occur in nuclear waste rely on estimated Transfer Factors (TFs) that often have high levels of uncertainty and only exist for a few species. Here, using two key radioisotopes found in nuclear waste, we show that taxonomic analyses and phylogenetically based trait prediction (PTP) can be used to both reduce uncertainty in current estimates of soil-to-plant TF and to predict them for the many species with no measurements. We grew 61 species of plants selected to provide a phylogenetically informed sample, measured their uptake of ⁹⁹Tc and ⁷⁵Se, and reconstructed their possible evolutionary relationships using gene sequence information. The uptake of Tc and Se isotopes by plants was correlated, and for Tc was more similar within plant groups than between them and included significant taxonomic and phylogenetic influences. We use these findings to suggest improved soil-to-plant Transfer Factors (TFs) for⁹⁹Tc and ⁷⁹Se. We suggest that the approaches we used might be useful for a range of radionuclides, in both improving current estimates of TF and for predicting TFs to plants and, perhaps, to other biota. Such improvements might be useful not only for environmental assessments of nuclear waste disposal but also the environmental regulation of a nuclear industry being expanded in several nations to help meet targets for reducing global CO₂ emissions.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107622"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143074704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling soil – Vegetation – Atmospheric interactions of radon products in a Belgian Scots pine forest site","authors":"Jordi Vives i Batlle","doi":"10.1016/j.jenvrad.2024.107607","DOIUrl":"10.1016/j.jenvrad.2024.107607","url":null,"abstract":"<div><div>A soil-vegetation-atmospheric transfer (SVAT) model for radon and its progeny is presented to improve process-level understanding of the role of forests in taking-up radionuclides from soil radon outgassing. A dynamic system of differential equations couples soil, tree (Scots pine) and atmospheric processes, treating the trees as sources, sinks and conduits between the atmosphere and the soil. The model's compartments include a dual-layer soil column undergoing hydrological and solute transport, the tree system (comprising roots, wood, litter, and foliage) and the atmosphere, with physical processes governing the transfers of water and radon products between these compartments. A dose post-processor calculates dose rates to the trees from internal, external, and surface radiation exposures. The model parameterisation is based on measurement data from the Grote Nete Valley in the Belgian Campine region.</div><div>The model results suggest that the tree intake of radon progeny is principally from the atmosphere, whereas radium is mainly taken-up from soil by the root uptake process, leading to an additional fraction of ingrown radon progeny in the tree by this route. It is also suggested that atmospheric uptake of radon is an essential mechanism when evaluating the tree uptake of ²¹⁴Po, ²¹⁴Pb and ²¹⁸Po and subsequent decay products. The model also indicates a slow uptake of radionuclides by the tree roots, with timescales in the order of years, leading to different dose rates for young and mature trees. The importance of foliar surface deposition, leading to a dominance of surface doses to the tree needles, is also highlighted. These mechanisms, ignored in most assessment models, are necessary improvements for assessment tools dealing with the impact of radon and its progeny in forests, with regard to legacy sites with ²²⁶Ra contamination.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107607"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142894814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preferential adsorption of noble gases in zeolitic tuff with variable saturation: A modeling study of counter-intuitive diffusive-adsorptive behavior","authors":"John P. Ortiz ,&nbsp;Chelsea W. Neil ,&nbsp;Harihar Rajaram ,&nbsp;Hakim Boukhalfa ,&nbsp;Philip H. Stauffer","doi":"10.1016/j.jenvrad.2024.107608","DOIUrl":"10.1016/j.jenvrad.2024.107608","url":null,"abstract":"<div><div>Noble gas transport through geologic media has important applications in the prediction and characterization of measured gas signatures related to underground nuclear explosions (UNEs). Retarding processes such as adsorption can cause significant species fractionation of radionuclide gases, which has implications for measured and predicted signatures used to distinguish radioxenon originating from civilian nuclear facilities or from UNEs. Accounting for the effects of variable water saturation in geologic media on tracer transport is one of the most challenging aspects of modeling gas transport because there is no unifying relationship for the associated tortuosity changes between different rock types, and reactive transport processes such as adsorption that are affected by the presence of water likewise behave differently between gas species. In this study, we perform numerical diffusive-adsorptive transport simulations to estimate gas transport parameters associated with bench-scale laboratory diffusion cell experiments measuring breakthrough in zeolitic and non-zeolitic rocks for a gaseous mixture of xenon, krypton, and SF<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span> at varying degrees of water saturation (<span><math><msub><mrow><mi>S</mi></mrow><mrow><mi>w</mi></mrow></msub></math></span>). Counter-intuitive transport behavior was observed in the zeolitic rock experiments whereby breakthrough concentrations were significantly higher when the core was partially saturated (<span><math><mrow><msub><mrow><mi>S</mi></mrow><mrow><mi>w</mi></mrow></msub><mo>=</mo><mn>17</mn></mrow></math></span>%) than under dry (<span><math><mrow><msub><mrow><mi>S</mi></mrow><mrow><mi>w</mi></mrow></msub><mo>=</mo><mn>0</mn></mrow></math></span>%) conditions. Breakthrough of xenon was especially retarded in the dry core – likely due to comparatively high affinity of xenon for zeolitic adsorption sites – and estimated effective diffusion coefficients for all gases were approximately an order of magnitude lower than what is predicted by porosity-tortuosity models. We propose the counter-intuitive behavior observed is because water infiltration of zeolite nanopores reduces both the adsorptive capacity of the rock and the tortuosity of connected flow paths. We developed a two-site competitive kinetic Langmuir adsorption reaction for the porous media transport simulator in order to constrain transport parameters within zeolitic tuff, where differential adsorption to zeolite and non-zeolite pores was observed. We determined that liquid saturation-dependent diffusive-adsorptive transport is affected by subtle and at times competing processes that are specific to different gases, which have a significant overall influence on effective transport parameters.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107608"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142921137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"90Sr and 137Cs distribution in Chornobyl forests: 30 years after the nuclear accident","authors":"D. Holiaka ,&nbsp;S. Levchuk ,&nbsp;V. Kashparov ,&nbsp;V. Yoschenko ,&nbsp;P. Hurtevent ,&nbsp;F. Coppin ,&nbsp;J.C. Beasley","doi":"10.1016/j.jenvrad.2025.107616","DOIUrl":"10.1016/j.jenvrad.2025.107616","url":null,"abstract":"<div><div>The primary aim of this study was to quantify patterns in the distribution of ⁹⁰Sr and ¹³⁷Cs activity in pine (<em>Pinus sylvestris</em> L.: 18 sites) and birch (<em>Betula pendula</em> Roth.: 2 sites) forests within the Chornobyl exclusion zone, 30 years after the Chornobyl nuclear power plant (NPP) accident (1986). To achieve this, radionuclide activity concentrations were measured in the mineral and organic soil horizons, the green forest floor (grasses, mosses, and lichens), and trunk wood in forest plots dominated by either pine or birch trees.Our results showed that the geometric mean of the ⁹⁰Sr aggregated transfer factors from mineral soil to the trunk wood of pine trees (T_ag) for Scots pines was 24 x 10⁻³ m² kg⁻¹, which is an order of magnitude higher than the IAEA Handbook (2010)reference value (1.7 x 10⁻³ m² kg⁻¹), which were based on studies conducted after the Kyshtym accident (Ural region, Russia) and in the first years following the Chornobyl accident (Ukraine and Belarus). The observations suggest that the above-ground biomass (soil organic layers, green forest floor, and trees) may contribute more to the ⁹⁰Sr inventory than the mineral soil at the stand level. In contrast, the ¹³⁷Cs T_ag values for pine and birch stands were consistent with those reported in the literature (ranging from 0.1 to 10 and 0.5-1.1 x 10⁻³ m² kg⁻¹, respectively). Both results align with the known bioavailability of radionuclides from previous studies: low for ¹³⁷Cs, leading to limited soil depth migration (less than 30 cm in the mineral horizon), and higher for ⁹⁰Sr, resulting in greater soil migration (up to 1 m in the mineral horizon). This study highlighted significant correlations between the radionuclides' activity concentrations in the litter layers and their content in the trunk wood of pine trees.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107616"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142964693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiological considerations in using uranium mine waste rock for road construction materials","authors":"Gopal P. Verma ,&nbsp;Pallavi Singhal ,&nbsp;Sanjay Kumar Jha ,&nbsp;Pradeep Bhargava ,&nbsp;Abhigyan ,&nbsp;Vivek Shanker Shrivasatava ,&nbsp;Narendra Kumar Shetty ,&nbsp;Aditi C. Patra ,&nbsp;Dinesh Kumar Aswal","doi":"10.1016/j.jenvrad.2024.107613","DOIUrl":"10.1016/j.jenvrad.2024.107613","url":null,"abstract":"<div><div>India's road construction is vital for its infrastructure growth, requiring approximately 20,000 tons of high-quality aggregates per kilometer - materials that are increasingly scarce, leading to higher costs and delays. The industrial sector, a cornerstone of the Indian economy, also struggles with waste management. Earlier studies suggested that industrial waste can be used in road construction materials however, the radiological considerations were not focused. This paper explores the potential of utilizing uranium mine waste rock in road construction materials. In the early stages of uranium mining in India, millions of tons of waste rock are generated and typically discarded, requiring extensive land and costly management. In this study, we assessed the radiological considerations in using waste rocks as road construction material generated from lean uranium ore. For this, a typical layered road design in India is adopted and dose rate were evaluated by QAD-CGGP code calculations and real-world measurements. Results indicate that the external radiation dose by using these waste rock in road construction materials remains below 1 mSv/year for the public. The observed dose rate complies the National regulatory agency; Atomic Energy Regulatory Board criteria of 1 mSv/y for the unrestricted use of bulk materials in public domain. This approach not only addresses resource scarcity but also supports environmental sustainability by conserving natural resources, reducing ecological imbalances, and promoting a circular economy.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107613"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142965280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radio-sulfur (35S) as short-term water residence time tracer – Step-by-step instruction for sample preparation and LSC setup","authors":"Michael Schubert ,&nbsp;Juergen Kopitz ,&nbsp;Sabine Taeglich ,&nbsp;Richard K. Bibby ,&nbsp;Lorenzo Copia ,&nbsp;Bradley McGuire ,&nbsp;Stephen Wangari ,&nbsp;Astrid Harjung","doi":"10.1016/j.jenvrad.2025.107627","DOIUrl":"10.1016/j.jenvrad.2025.107627","url":null,"abstract":"<div><div>Due to its short half-life (87 days), naturally occurring radio-sulfur (³⁵S) is applicable as aqueous environmental tracer for investigating groundwater residence times shorter than one year. Being a pure β-decaying radionuclide, ³⁵S is detected straightforwardly by means of liquid scintillation counting (LSC). The rather low ³⁵S activities in natural waters require (i) a careful sample preparation aiming at extracting ³⁵SO₄²⁻ from large-volume water samples (ca. 20 L) resulting in samples ready for LSC measurement and (ii) an optimal device-specific setup of the LSC to maximize the ³⁵S signal-to-noise-ratio. A few publications that discuss approaches for sample preparation and device-specific LSC setup optimization are available. This paper presents a summarizing step-by-step instruction for both optimized sample preparation and LSC setup. For practical reasons, two different sample preparation approaches are presented, one for samples with low total sulphate inventories (up to 350 mg) and one for samples with elevated total sulphate inventories (350–1500 mg). LSC setup optimization aiming at the measurement of the two resulting types of samples is described for three LSC devices, namely Quantulus GCT, TriCarb 3170 TR/SL, and Quantulus LB 1220.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107627"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detecting 127Xe in an atmospheric tracer experiment","authors":"Paul W. Eslinger ,&nbsp;Matthew A. Goodwin ,&nbsp;Ramesh S. Sarathi ,&nbsp;Glen A. Warren ,&nbsp;Brian T. Schrom ,&nbsp;Michael Foxe ,&nbsp;Daniel Chester ,&nbsp;Graham Galvin ,&nbsp;Reagan S. Turley ,&nbsp;L. Daniel Hardy ,&nbsp;PE-1 Experiment Team","doi":"10.1016/j.jenvrad.2025.107614","DOIUrl":"10.1016/j.jenvrad.2025.107614","url":null,"abstract":"<div><div>The Xcounts algorithm for calculating air concentrations of radioactive xenon isotopes (Eslinger et al., 2023) has been extended to estimate ¹²⁷Xe in addition to ^131mXe, ^133mXe, ¹³³Xe, and ¹³⁵Xe. The algorithm was applied to 119 samples collected with a SAUNA Q_B system (Ringbom et al., 2023) during a two-month atmospheric tracer release experiment. The algorithm identified two samples with ¹²⁷Xe present from a single 1.5 h release about 3.5 km upwind of the sampler and no false detections of ¹²⁷Xe were observed in the other samples.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"282 ","pages":"Article 107614"},"PeriodicalIF":1.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}