检测(英文) Pub Date : 2023-01-01 DOI: 10.4236/detection.2023.101001

D. Russell

引用次数: 0

Comparative Alpha Tracks Counting Using an Optical Microscope and a Spark Counter 使用光学显微镜和火花计数器的比较α轨道计数

检测(英文) Pub Date : 2023-01-01 DOI: 10.4236/detection.2023.102002

Dabo S. I. Agba, Ponaho Kezo, Issa Konaté

{"title":"Comparative Alpha Tracks Counting Using an Optical Microscope and a Spark Counter","authors":"Dabo S. I. Agba, Ponaho Kezo, Issa Konaté","doi":"10.4236/detection.2023.102002","DOIUrl":"https://doi.org/10.4236/detection.2023.102002","url":null,"abstract":"In the metrology of radon, an environmental lung carcinogen, the integrated measurements necessary for epidemiological studies are made very often using the tracks detector LR 115 type 2. For dosimetric analysis, the etched tracks from radon alpha particles on this detector are usually counted by means of an optical microscope or a spark counter. An optimal reading of the track densities which must be converted into radon concentrations, can’t be done without a good mastery of the mode of operation and use of these devices. Furthermore, investigations to know as to whether or not each of those can be used to determine radon concentration are necessary. These are the objectives of the present work in which LR 115 samples exposed to radon for at least 3 months, were chemically developed under standard conditions and read. The track densities obtained with the microscope are very much higher than those of the counter for each sample. These results are consistent with those published by other authors. However, each of these devices can be used interchangeably for alpha tracks counting, as both provide radon concentrations with a very good linear correlation coefficient of 0.95 taking into account their respective calibration factors for the reading of this detector. In addition, the saturation phenomenon for the spark counter reading of LR 115 detector occurs beyond 11,000 tr/cm2, a density never reached during our environmental radon measurements.","PeriodicalId":68695,"journal":{"name":"检测(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135609324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of Radiating Aperture Using the Iterative Method 辐射孔径的迭代建模

检测(英文) Pub Date : 2022-01-01 DOI: 10.4236/detection.2022.93003

R. Mejri, T. Aguili

引用次数: 0

The Measurement and Evaluation of the Electromagnetic Environment from 5G Base Station 5G基站电磁环境的测量与评估

检测(英文) Pub Date : 2022-01-01 DOI: 10.4236/detection.2022.91001

Weiwei Huang, Yanan Hu, Jinjun Zhu, Zenan Cen, Jiali Bao

引用次数: 1

Direct Conversion X-Ray Detectors with High Sensitivity at Low Dose Rate Based on All-Inorganic Lead-Free Perovskite Wafers 基于全无机无铅钙钛矿晶片的低剂量率高灵敏度直接转换x射线探测器

检测(英文) Pub Date : 2022-01-01 DOI: 10.4236/detection.2022.92002

Cui-rui Zhang

引用次数: 2

Monitoring and Evaluation of Air Pollution at Ohaji/Egbema Flow Station and Its Environs via GPS in Ohaji Egbema Lga, Imo State Nigeria 基于GPS的尼日利亚伊莫州Ohaji Egbema州Ohaji/Egbema流站及其周边地区空气污染监测与评价

检测(英文) Pub Date : 2022-01-01 DOI: 10.4236/detection.2022.94004

S. O. Anyikwa, O. Ndukwe, Theresa Chinwendu Umeojiakor, P. Nnaji, Ndidiamaka Martina Amadi

引用次数: 1

Bulk Etch Rate of LR 115 Polymeric Radon Detector ll115型聚合物氡探测器的整体蚀刻速率

检测(英文) Pub Date : 2021-01-01 DOI: 10.4236/DETECTION.2021.81001

D. S. Agba, K. Djagouri, B. L. Gogon, A. A. Koua

引用次数: 0

Natural Radionuclides Content in Granites from Operational Quarry Sites 采石场花岗石的天然放射性核素含量

检测(英文) Pub Date : 2019-01-25 DOI: 10.4236/detection.2019.71001

Jamiu Idowu Lawal

{"title":"Natural Radionuclides Content in Granites from Operational Quarry Sites","authors":"Jamiu Idowu Lawal","doi":"10.4236/detection.2019.71001","DOIUrl":"https://doi.org/10.4236/detection.2019.71001","url":null,"abstract":"Natural radionuclides content in \u0000granite from eight functional quarries in Osun State, Southwestern Nigeria was assessed. Eighty \u0000granite samples comprise ¾ inches. ½ inch and stone-dust \u0000were collected from Wolid, Slava, Ayofe, Espro, Ife/Modakeke, Krystal Vountein, \u0000Clario and Omidiran quarries in the State. Measurement was done using a high \u0000purity germanium (HPGe) detector. The statistical analysis was carried out \u0000using Statistical Package for Social Sciences (SPSS) software to determine if \u0000granite size has an impact on the activity concentrations. The results revealed \u0000that the mean activity concentrations of 238U (12.64 ± 1.89 Bq·kg -1) and 232Th (16.93 ± 2.46 Bq·kg -1) were highest in ¾ inch granite \u0000and lowest in stone-dust (5.01 ± 0.77 and 8.97 ± 1.37 Bq·kg -1 respectively), whereas 40K is highest in the ¾ inches (266.19 ± 35.53 \u0000Bq·kg -1) and lowest in ½ inches \u0000(151.85 ± 25.09 Bq·kg -1) granite. Espro has the highest (23.75 ± 3.74 Bq·kg -1) while Wolid has the lowest (4.11 ± 0.73 Bq·kg -1) 238U activity concentration and Slava has \u0000lowest for 232Th (8.21 ± 1.12 Bq·kg -1) and 40K \u0000(109.54 ± 11.06 Bq·kg -1). The radiological hazard parameters such as absorbed \u0000dose, annual effective dose radium equivalent, gamma index, external index, and internal index, were calculated to assess the radiation hazards \u0000associated with granite samples. The results obtained are lower than the \u0000recommended limits. The results were compared with the published data of other \u0000countries. Although, all the \u0000calculated radiation hazard indices were lower than the permissible limits. \u0000Therefore, people working in the quarries, granite end-users and the \u0000general public are safe from radiological health risks from the quarries, since \u0000there is no significant health hazard. The research will give reliable \u0000information on activity concentrations of natural radionuclides in granite \u0000rocks, contribute to a better understanding of radioactivity distribution in \u0000granite, and develop standards.","PeriodicalId":68695,"journal":{"name":"检测(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43710423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

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