Reliability of single aliquot regenerative protocol (SAR) for dose estimation in quartz at different burial temperatures: A simulation study |
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| Institution: | 1. Health and Safety Group, Bhabha Atomic Research Center, Mumbai 400085, India;2. Physics Department, McDaniel College, Westminster, MD 21157, USA;3. Physics Group, Bhabha Atomic Research Center, Mumbai 400085, India;1. Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India;2. Department of Neuroradiology, All India Institute of Medical Sciences, New Delhi, India;3. Department of Radiotherapy, All India Institute of Medical Sciences, New Delhi, India;4. Department of Medical Physics, All India Institute of Medical Sciences, New Delhi, India;5. Department of Radiology, All India Institute of Medical Sciences, New Delhi, India;1. Institute of Photonics and Advanced Sensing, School of Physical Sciences, University of Adelaide, Adelaide 5005, Australia;2. Weapons and Combat Systems Division, Defence Science and Technology Group, P.O. Box 1500, Edinburgh 5111, Australia;1. Ionizing Radiation Metrology Department, National Institute for Standards, El-Haram, Giza, Egypt;2. Physics Department, Faculty of Science, Fayoum University, Fayoum, Egypt;3. Nuclear Physics and Elementary Particles Physics Section, Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Makedonia, Greece;1. Chair of Geomorphology & BayCEER, University of Bayreuth, 95440 Bayreuth, Germany;2. IRAMAT-CRP2A, Université Bordeaux Montaigne, Maison de l’Archéologie, Esplanade des Antilles, 33607 Pessac Cedex, France;1. Physics Department, McDaniel College, Westminster, MD 21157, USA;2. Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel |
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| Abstract: | The single aliquot regenerative protocol (SAR) is a well-established technique for estimating naturally acquired radiation doses in quartz. This simulation work examines the reliability of SAR protocol for samples which experienced different ambient temperatures in nature in the range of −10 to 40 °C. The contribution of various experimental variables used in SAR protocols to the accuracy and precision of the method is simulated for different ambient temperatures. Specifically the effects of paleo-dose, test dose, pre-heating temperature and cut-heat temperature on the accuracy of equivalent dose (ED) estimation are simulated by using random combinations of the concentrations of traps and centers using a previously published comprehensive quartz model. The findings suggest that the ambient temperature has a significant bearing on the reliability of natural dose estimation using SAR protocol, especially for ambient temperatures above 0 °C. The main source of these inaccuracies seems to be thermal sensitization of the quartz samples caused by the well-known thermal transfer of holes between luminescence centers in quartz. The simulations suggest that most of this inaccuracy in the dose estimation can be removed by delivering the laboratory doses in pulses (pulsed irradiation procedures). |
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| Keywords: | Luminescence Quartz model SAR protocol Pulsed irradiation |
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