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Littérature scientifique sur le sujet « Surface alpha radioactivity »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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Articles de revues sur le sujet "Surface alpha radioactivity"

Cfarku, Florinda, and Irma Berdufi. "GROSS ALPHA/BETA ACTIVITY DETERMINATIONIN DRINKING WATER PROFICIENCY TESTS." Jurnal Ilmiah Ilmu Terapan Universitas Jambi 8, no. 2 (2024): 804–11. http://dx.doi.org/10.22437/jiituj.v8i2.32635.

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Water intended for drinking purposes has to be analyzed first for gross alpha/beta activity according to national and international standards and recommendations. According to Albanian legislation, Article 6, the gross alpha/beta radioactivity concentration in water, should be below the level of 0.1 Bq/L and 1 Bq/L respectively for human consumption. Our laboratory participated in an interlaboratory comparison organized by IAEA Terrestrial Environmental Laboratory under suggestion of ALMERA members. Proficiency Test among environmental radioactivity monitoring laboratories for the determinatio

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Kiso, Mizuki, Manaya Taoka, Aoi Sampei, et al. "Effect of sampling face velocity on the ultrafine particle surface collection efficiency of a cellulose membrane filter and a cellulose-glass fiber filter for environmental airborne radioactivity monitoring." Radiation Protection Dosimetry 200, no. 16-18 (2024): 1671–75. http://dx.doi.org/10.1093/rpd/ncae191.

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Abstract Surface collection efficiency (SCE) of a cellulose membrane filter (CMF) and a cellulose-glass fiber filter used in environmental monitoring for alpha-emitting radionuclides from nuclear facilities and natural radioactivity sources was evaluated for particles in the size range of 0.03–0.1 μm at different levels of face velocity. The SCE of the CMF was higher than that of the cellulose-glass fiber filter, and only the membrane filter showed the dependence of SCE on the particle size at higher face velocity. The use of the CMF at higher face velocity in environmental radioactivity monit

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Caridi, Francesco, Domenico Pappaterra, Giovanna Belmusto, and Maurizio D'Agostino. "Radioactivity Measurements in Water: An Overview of the Actual Technologies." Current Nutrition & Food Science 17, no. 6 (2021): 548–52. http://dx.doi.org/10.2174/1573401317666210122091439.

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Among the most significant matrices in the field of environmental radioactivity, water is certainly included, being subject to monitoring and controls to safeguard the environment from possible anthropogenic contamination. The presence of radionuclides in water also constitutes a health risk to human, because its consumption increases the likelihood of incurring cancer. In authors’ laboratory, different experimental techniques were employed to measure radioactivity content of surface and drinking water, according to the Italian Legislation and to the Italian Institute for the Environmental Pro

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Lunardon, Marcello, Paolo Sartori, Pierino De Felice, and Luca Stevanato. "Development of a prototype of monitor for alpha and beta radiation in water using new silicone-based contamination-safe detectors." EPJ Web of Conferences 288 (2023): 06005. http://dx.doi.org/10.1051/epjconf/202328806005.

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We present here the main results of an experimental activity aimed at the realization of a prototype of monitor for alpha and beta radioactivity in water exploiting a novel type of contamination-safe scintillation detector developed by our research group. Due to the short path-length of alpha and beta particles in water and the low detection limits needed to be compliant with the international legislations in matter of radiation safety for water, the detectors to be used for such a kind of instruments should have in general large area, very low intrinsic background and avoid any kind of window

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Hashim, Abdalsattar Kareem, Sara Salih Nayif, Elham Jasim Mohammed, Ali F. Al-Rawaf, and Ali Abid Abojassim. "Environmental Radioactivity of Alpha in Paint samples of Iraqi Markets." IOP Conference Series: Earth and Environmental Science 1262, no. 2 (2023): 022001. http://dx.doi.org/10.1088/1755-1315/1262/2/022001.

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Abstract By using a sealed technology, radon levels were determined, annual effective dose, the effective content of radium, radon exhalation rate and uranium concentrations to be the total 30 samples materials used to paint the walls of buildings and homes in Iraq. It was found that the recommended value for all samples for radon concentration is with low potency radium content of 300 Bq / m3 and 370 Bq / kg respectively. In addition, Annual effective dose in all values was found to be less than the permission level (10 mSv / y). The values of exhalation rate relative to samples lower than th

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K, Charan Kumar. "Study of Atmospheric Instabilities through Radioactivity." Mapana - Journal of Sciences 14, no. 1 (2017): 15–23. http://dx.doi.org/10.12723/mjs.32.3.

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Radon and its progeny concentration are measured at 1m height from surface of Earth in the premises of National Atmospheric Research Laboratory, Gadanki to observe the changes in activity concentration of radon particularly during instabilities that are occurring in the atmosphere. The measurements were carried out using AlphaGUARD and Alpha Progeny Meter for the measurement of radon and its progenies, respectively. It has been observed that, the changes in daily and weekly atmospheric radon levels are related to the stability or turbulence of the lower troposphere. The analysis reveals that f

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Elzain, Abd-Elmoniem A., Hajo Idriss, Yousif Sh Mohammed, et al. "Assessment of radioactivity from selected soil samples from Halfa Aljadida area, Sudan." Radiochimica Acta 107, no. 6 (2019): 489–502. http://dx.doi.org/10.1515/ract-2018-3067.

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Abstract In this research, the results of radon concentration, surface and mass exhalation rates, radium concentration, effective dose rate and the alpha index have been investigated in a number of 198 soil samples that have been collected from various residential locations of Halfa Aljadida area, Sudan. The can technique, containing CR-39 have been used. From our results, the average value of soil gas radon concentration was found to be 1.96±0.22 kBq·m−3. The average values of surface and mass exhalation rates were 1.73±0.19 Bq·m−2·h−1 and 34.79±3.87 mBq·kg−1·h−1, respectively. The radium con

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Tăban, Cecilia Ionela, Ana Maria Benedek, Mihaela Stoia, Maria Denisa Cocîrlea, and Simona Oancea. "A Multivariate Model of Drinking Water Quality Based on Regular Monitoring of Radioactivity and Chemical Composition." Applied Sciences 13, no. 18 (2023): 10544. http://dx.doi.org/10.3390/app131810544.

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From a public health perspective, the monitoring of water quality intended for human consumption belongs to the operational and audit management of the supply zones. Our study explores the spatial and temporal patterns of the parameters of drinking water in Sibiu County, Romania. We related the relevant physical-chemical parameters (ammonia, chlorine, nitrates, Al, Fe, Pb, Cd, Mn, pH, conductivity, turbidity, and oxidizability) and radioactivity (gross alpha activity, gross beta activity, and radon-222 content) from a 5-year survey to the water source (surface water and groundwater, which may

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Kücükömeroglu, B., A. Kurnaz, R. Keser, et al. "Radioactivity in sediments and gross alpha–beta activities in surface water of Fırtına River, Turkey." Environmental Geology 55, no. 7 (2007): 1483–91. http://dx.doi.org/10.1007/s00254-007-1098-7.

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Soniya, S. R., and P. J. Jojo. "Natural radioactivity assessment of surface soil collected from Poovar village of Kerala, India." IOP Conference Series: Materials Science and Engineering 1263, no. 1 (2022): 012034. http://dx.doi.org/10.1088/1757-899x/1263/1/012034.

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Making use of gamma ray spectrometric analysis method, the activities of soil-borne radio-nuclides viz. 226Ra, 232Th and 40K in the surface soil samples from a specific village in coastal county has been determined. The surface soil of living environment in the Poovar village was used for the study. The activity concentration is used for evaluating various radiologically vital parameters such as levels of radium equivalent activity (Raeq), external hazard index (Hex), internal hazard index (Hin), absorbed gamma dose rate (D), outdoor and indoor annual effective dose (AED), representative gamma

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Thèses sur le sujet "Surface alpha radioactivity"

MAIANO, CECILIA GIOVANNA. "Analysis of surface radioactive background contributions and study of rare decays in the cuore experiment." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/20194.

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Rare Physics event is playing a crucial role, not only in Fundamental Interaction Physics, but also in Astroparticle Physics and in Cosmology. These signals, if detected, would give an importatnt evidence of new Physics. The CUORE experiment (Cryogenic Underground Observatory for Rare Events) is a proposed tightly packed array of 988 TeO2 bolometers, each being a cube 125 cm3 on a side with a mass of 750 g. The array consists of 19 vertical towers, arranged in a compact cylindrical structure. Each tower will consist of 13 layers of 4 crystals. The design of the detector is optimized for

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Chapitres de livres sur le sujet "Surface alpha radioactivity"

Herz, Norman, and Ervan G. Garrison. "Radiation-Damage, Cosmogenic, and Atom-Counting Methods." In Geological Methods for Archaeology. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195090246.003.0010.

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Fission-track dating, one of the more recent techniques involving the use of radioactivity, has developed one of the widest ranges of applications. Dates of objects have been obtained ranging from 6 months to 109 years BP. Volcanic tephra, obsidian, man-made and basaltic glass, meteorites, and mica have been dated. A more apt term is nuclear-track dating because fissionable elements do not have to be present in the material. Fission, which produces one form of nuclear track, is a rare mode of radioactive decay. A more common decay is alpha decay, which produces a different type of track. Urani

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"Radon mitigation and dosimetry." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.43.4.

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Radon is a naturally occurring radioactive noble gas present in the environment. Its infiltration into buildings from the ground can lead to indoor air pollution if the rooms are poorly ventilated. High radon concentrations in enclosed spaces pose a significant health risk, as radon is the second leading cause of lung cancer after smoking, contributing to approximately 10% of cases in Europe [1]. The dose received is primarily due to radon progeny (²¹⁸Po, ²¹⁴Pb, ²¹⁴Bi, ²¹⁴Po), which, being solid in nature, attach to airborne aerosols that are subsequently inhaled. This research project, focuse

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Actes de conférences sur le sujet "Surface alpha radioactivity"

Naito, Susumu, Shuji Yamamoto, Mikio Izumi, Yosuke Hirata, Yukio Yoshimura, and Tatsuyuki Maekawa. "Alpha Radioactivity Monitor Using Ionized Air Transportation for Large Size Uranium Waste: Part 1—Large Measurement Chamber and Evaluation of Detection Performance." In ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2010. http://dx.doi.org/10.1115/icem2010-40093.

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We present an ionized air transportation type alpha radioactivity monitor to efficiently perform the clearance level inspection for large size uranium waste and its detection performance. In previous work, we developed a prototype monitor with an about 1000 mm cubic measurement chamber to measure the cut waste. However, in a survey of target waste, we found that it is desired to measure not only the cut waste but also the lengthy waste such as uncut cylinders. Therefore, we developed an alpha radioactivity monitor with a long and large measurement chamber (effective sizes: 500 mm x900 mm x3200

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"INTER-LABORATORY COMPARISON OF SURFACE EMISSION RATE MEASUREMENTS OF WIDE AREA SOURCES." In RAD Conference. RAD Centre, Niš, Serbia, 2023. http://dx.doi.org/10.21175/radproc.2023.12.

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The National Institute of Ionizing Radiation Metrology of ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development) (ENEA-INMRI) organized 7 national Inter- Laboratory Comparisons (ILC) on the measurement of the environmental radioactivity and of radionuclides of medical interest. In this paper, the ILC N°6, on surface contamination measurements, will be described. The objectives of this ILC were to test, at the national level, the participant capability of measuring the surface emission rate of two Wide Area Sources (WAS) of 241Am (alpha emitter) and of

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Pottinger, M. P., and C. H. Orr. "Free-Release Monitoring Equipment in the UK Nuclear Power Industry." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4564.

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In the nuclear power industry, many techniques are used to confirm that items are suitable for free-release. These techniques usually involve monitoring of the items with at least one type of radiometric instrument, to ensure that no significant quantity of man-made radioactivity is present. These monitoring techniques depend on the stage in the clearance process, the application and the size of the article being monitored. The UK Radioactive Substances Act has a Substances of Low Activity (SoLA) exemption which allows for articles and waste that have a man-made radioactive content less than 0

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Mikheykin, S. V., P. P. Poluektov, S. L. Khrabrov, A. Yu Smirnov, and V. P. Simonov. "D&D Experience in VNIINM." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4769.

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Since the mid-1960s the VNIINM has been developing decontamination techniques for a variety of materials and contaminants for Russian nuclear engineering needs. 1. Early in the development, chemical decontamination was the most commonly used method. According to the nature of contaminants and contaminated material, mineral acids, alkali, mineral and organic oxidants and reductants were used. For best results, complex forming agents were sometimes added. However, in spite of widespread use of chemical decontamination at the USSR nuclear facilities, this technique has a drawback of producing a g

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Willems, M., L. Krieckemans, P. Luycx, and A. Meeus. "The HRA/Solarium Project: Processing of Widely Varying High- and Medium-Level Waste." In ASME 2001 8th International Conference on Radioactive Waste Management and Environmental Remediation. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/icem2001-1209.

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Abstract Starting in 2002, Belgoprocess will proceed with the treatment and conditioning of some 200 m3 of widely varying high- and medium-level wastes from earlier research and development work, to meet standard acceptance criteria for later disposal. The gross volume of primary and secondary packages amounts to 2,600 m3. The wastes have been kept in decay storage for up to 30 years. The project was started in 1998. Operation of the various processing facilities will take 7–8 years. The overall volume of conditioned waste will be of the order of 800 m3. All conditioned waste will be stored in

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