A new label dosimetry system |
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| Institution: | 1. National Center for Radiation Research and Technology, Nasr City, P.O. Box 29, Cairo, Egypt;2. Nuclear Research Center, AEA, Egypt;1. Radiation Protection and Dosimetry Department, National Center for Radiation Research and Technology, Atomic Energy Authority (AEA), P.O. Box 8029, Nasr City, Cairo, Egypt;2. Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt;3. ESRF-The European Synchrotron, 71, Avenue des Martyrs, Grenoble, France;1. Radiation Protection and Dosimetry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt;2. ESRF - European Synchrotron Radiation Facility, ID17 Biomedical Beamline, 71 Avenue des Martyrs, 38000, Grenoble, France;3. STROBE Inserm UA07, Grenoble Alpes University, Grenoble, France;4. Swansea University Medical School, Singleton Park, Swansea, SA2 8PP, United Kingdom;5. Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt;1. National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), P.O. Box 8029, Nasr City, Cairo 11787, Egypt;2. ESRF-The European Synchrotron, ID17 Biomedical beamline, 71 Avenue des Martyrs, 38000 Grenoble, France;3. UA7 STROBE Inserm, Grenoble Alpes University, Grenoble, France;4. Swansea University Medical School, Singleton Park, Swansea SA2 8PP, United Kingdom;1. Department of Physics, Faculty of Sciences, Arak University, P.O. Box 38156-8-8349, Arak, Iran;2. Radiation Applications Research School, Nuclear Science and Technology Research Institute, AEOI, P.O. Box 11365-3486, Tehran, Iran;1. National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Cairo, Egypt;2. Chemistry Department, Faculty of Education, Ain Shams University, Cairo, Egypt;3. Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt |
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| Abstract: | A new label dosimeter which changes its color by large radiation doses has been developed. The green color of the unirradiated dosimeter gradually turns to brown then to red at high doses. The label dosimeter was prepared with a peal-off paper backing, allowing it to stick by self-adhesion to a product box. Three types of dosimeters having different sensitivities to radiation doses were prepared. Correlations were established between absorbed doses and color scale or the green/red axis of the irradiated dosimeters, using a micro color unit equipped with a data station. The data were analyzed to determine the reproducibility of the reflectance measured from the label dosimeters exposed to different doses of γ radiation. These dosimeters showed great stability on extended storage before and after irradiation.Detailed measurements of absorbed dose extremes (Dmin and Dmax) in product boxes, processed in the Egypt Mega Gamma I radiation processing facility, were obtained using these dosimeters. These dosimeters are currently available in large quantities and are inexpensive, which makes them suitable for routine high-dose applications in radiation processing of materials. |
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