Investigations of touchscreen glasses from mobile phones for retrospective and accident dosimetry |
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| Institution: | 1. Helmholtz Zentrum München GmbH – German Research Center for Environmental Health, Institute of Radiation Protection, Ingolstädter Landstr. 1, D-85764, Neuherberg, Germany;2. University of Salzburg, Department of Geography and Geology, Hellbrunnerstr. 34, A-5020, Salzburg, Austria;3. Istituto Superiore di Sanità, Unit of Ionizing Radiation Dosimetry and Radiation Damage Department of Technology and Health, Viale Regina Elena 299, I-00161 Rome, Italy;1. Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342 Krakow, Poland;2. Foundry Research Institute, Zakopianska 73, 30-418 Krakow, Poland;1. IRSN - Institut de Radioprotection et de Sûreté Nucléaire, BP17, 92262 Fontenay-aux-Roses Cedex, France;2. IRAMAT-CRP2A, Université Bordeaux Montaigne, Maison de l’Archéologie, 33607 Pessac Cedex, France;1. Radiation Dosimetry Laboratory, Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA;2. Radiation Physics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;1. Department of Archaeology, University of Durham, Dawson Building, South Road, Durham, DH1 3LE, UK;2. Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA |
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| Abstract: | Touchscreen glasses of mobile phones are sensitive to ionizing radiation and have the potential of usage as an emergency dosimeter for retrospective dosimetry for the purpose of triage after a radiological accident or attack. In this study the TL glow curves and dosimetric properties of touchscreen glasses were studied in detail, such as intrinsic background dose, dose response, reproducibility, optical stability and long-term stability of the TL signal.Preliminary results are additionally presented to minimize the intrinsic background dose by mechanically removing the surface layer of the glass samples. Additionally chemical element analyses of the touchscreen glass samples were carried out to investigate the difference between glass samples which show a TL signal and samples which show neither an intrinsic zero dose signal nor a radiation induced TL signal.An irradiation trial using glass samples stored in the dark demonstrated a successful dose recovery. However, when applying a realistic, external light exposure scenario, dose underestimation was observed, even though samples were pre-bleached prior to measurement. More investigations have to be carried out in the future to solve the challenge of the low optical stability of the TL signal, if touchscreen glasses are to be used as a reliable emergency dosimeter. |
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| Keywords: | Retrospective dosimetry Accident dosimetry Touchscreen glass of mobile phones Emergency dosimeter Thermoluminescence |
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