Spectroscopy of the gamma and X ray leakage radiation from the built-in sources of a Riso TL/OSL reader
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2014-12-01
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Kuenzel, Roseli 
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In this work we evaluate the intensity and the spectral shape of the leakage radiation from the built-in beta and alpha sources of a Riso TL/OSL reader. LiF (TLD-100), fluorite-based pellets and Al2O3:C detectors were used in order to determine the dose rate delivered to the dosimeters when the sources are closed. the leakage spectra under both alpha and beta sources were registered with a CdTe semiconductor detector. the spectrum measured under the beta source shows the X-ray beam generated by the interaction of the beta particles with the lead used to shield the source. Besides, the 59.4 keV gamma ray from Am-241 was registered under the alpha source. Dose rates from 50 to 100 mu Gy/h were obtained for the dosimeter positions in the turntable under the beta and the alpha sources with the luminescent dosimeters. (C) 2014 Elsevier B.V. All rights reserved.
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Radiation Measurements. Oxford: Pergamon-Elsevier B.V., v. 71, p. 197-200, 2014.