Wyniki wyszukiwania - BazTech

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Kalibracja detektorów termoluminescencyjnych UD-802 firmy Panasonic w polu promieniowania rentgenowskiego

Grygier Agata, Skubacz Krystian

Inżynier i Fizyk Medyczny

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2021

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Vol. 10, nr 3

237--240

PL

Śląskie Centrum Radiometrii Środowiskowej, działające w strukturach Głównego Instytutu Górnictwa, od lat zajmuje się ochroną radiologiczną oraz radioekologią. Ochrona radiologiczna jest bardzo szerokim tematem obejmującym między innymi monitorowanie dawek w środowisku pracy. W celu oceny dawek, jakie otrzymują osoby pracujące w warunkach narażenia na promieniowanie jonizujące, powszechnie stosuje się metodę detektorów termoluminescencyjnych. Metoda ta jest akceptowana w większości krajów. Cały proces oceny dawki za pomocą takich dozymetrów można podzielić na kilka etapów. Niewątpliwie jednym z najważniejszych jest etap kalibracji. W artykule przedstawiono wyniki napromieniowania dozymetrów Panasonic UD-802 w polach promieniowania rentgenowskiego o różnych energiach oraz pod różnymi kątami (0°, 30°, 60°). Na podstawie wyników otrzymanych podczas naświetlań wyznaczono współczynniki kalibracji.

EN

The Silesian Center of Environmental Radiometry, operating within the structures of the Central Mining Institute, has been dealing with radiological protection and radioecology for many years. Radiation protection is a very broad topic, including, inter alia, the monitoring of doses in the work environment. In order to assess the doses received by people working in conditions of exposure to ionizing radiation, the method of thermoluminescent detectors is commonly used. This method is accepted in most countries. The entire process of dose evaluation with such dosimeters can be divided into several steps. Undoubtedly, one of the most important is the calibration step. The article presents the irradiation results of Panasonic UD-802 dosimeters in X-ray fields of different energies and at different angles (0°, 30°, 60°). Based on the results obtained during the irradiation, the calibration coefficients were determined.

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Comparison of Panasonic`s dosimetric system with Gamma-31 dosimeters

Urban P., Skubacz K., Chmielewska I.

Journal of Sustainable Mining

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2013

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Vol. 12, iss. 4

24--33

EN

Equipment being used in medical or industrial institutions is often a source of ionizing radiation with different energies and types, which complicates the detection and assessment of doses. Up until now, for dosimetric measurements of ionizing radiation, Gamma-31 dosimeters have been used in the Central Mining Institute for many years. Now, this system will be expanded by a Panasonic system, for which measurement procedures were developed and comparisons with other dosimeters were held. The method is based on a four-element dosimeters UD-802 Panasonic equipped with CaSO and LiBO detectors additionally sheltered by filters of different surface mass. The use of UD-802 dosimeters, in contrast to Gamma-31 dosimeters, permits measuring radiation doses in a different range of photon energy. Consequently, it is possible to obtain a more accurate analysis of the hazards caused by gamma radiation in underground mines. The publication includes a description of the dosimetry system and presents the results of measurements conducted by means of both types of dosimeters. In order to verify the correctness of the indications of the new dosimetry system a series of measurements were carried out, which allowed examining the behaviour of the dosimeters under different environmental conditions. As a place of exposure, the selected laboratories in the Silesian Centre for Environmental Radiometry were chosen, where the work is connected with (TE)NORM and equipment producing ionizing radiation or containing sources of this type of radiation. Moreover, to observe the dosimeters behaviour in difficult environmental conditions, they were exposed in water treatment plants and an underground potassium salt mine.

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A hand phantom for radiological measurements

Majowska B., Tuszyński M.

Nukleonika

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2005

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Vol. 50, nr 4

167-172

EN

The paper presents the construction of a hand phantom and its usefulness for radiological measurements. Situations when the hand is exposed to ionizing radiation stimulated the invention of this phantom. An extremity dosimeter was placed on the middle finger of the phantom. All measured doses are relative. The doses were compared with the dose from the extremity dosimeter. The aim of this paper was not to show values of the measured doses in legal units but the authors wanted to show the difference between the dose received by the extremity dosimeter and the doses measured on the inside of the hand phantom. High-sensitive LiF:Mg,Cu,P thermoluminescence detectors were used for the measurements because of their small size and close tissue equivalence. The hand phantom makes it possible to acquire the dose distribution on the inside of the hand. The authors suggested the calculation of the coefficients: the average hand phantom coefficient CHPhAV and the maximum hand coefficient CHPhmax from phantom measurements. The extremity dosimeter dose estimates according to the recommended coefficients allowed to obtain more reliable values.