Quartz fast component opticallystimulated luminescence: Towards routine extraction for dating applications |
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| Institution: | 1. Department of Marine Science, Coastal Carolina University, 301 Allied Drive, Conway, SC, 29526, USA;2. Department of Earth and Environmental Sciences, Tulane University, 6823 St. Charles Avenue, New Orleans, LA, 70118-5698, USA;3. School of Environmental Sciences, University of Liverpool, Liverpool, L69 7ZT, UK;1. School of Geography and Tourism, Jiaying University, Meizhou, 514015, China;2. Department of Geography and Earth Sciences, Aberystwyth University, Ceredigion, SY23 3DB, UK;1. Department of Science, Systems and Models, Roskilde University, Denmark;2. Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University, Denmark;3. Center for Nuclear Technologies, Technical University of Denmark, DTU Risø Campus, Denmark;4. Institute for Ancient Near Eastern Archaeology, Free University Berlin, Germany;5. DNRF Centre “Glass and Time,” Department of Science, Systems and Models, Roskilde University, Denmark;1. Department of Earth and Environmental Sciences, Tulane University, New Orleans, LA, USA;2. Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN, USA;3. Netherlands Centre for Luminescence Dating & Soil Geography and Landscape Group, Wageningen University, Wageningen, The Netherlands;4. Department of Marine Science, Coastal Carolina University, Conway, SC, USA;1. Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University, DTU Risø Campus, Roskilde 4000, Denmark;2. Center for Nuclear Technologies, Technical University of Denmark, DTU Risø Campus, Roskilde 4000, Denmark;3. Geological Survey of Israel, 30 Malkhe Israel Street, Jerusalem 95501, Israel;4. Dead Sea-Arava Science Center, Patio 655, Eilat 88133, Israel;1. Institute of Nanosciences and Nanotechnology, NCSR “Demokritos”, Ag. Paraskevi, 15310, Athens, Greece;2. Nuclear Physics Laboratory, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece;3. Solid State Section, Physics Department, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece;4. McDaniel College, Physics Department, Westminster, MD, 21157, USA |
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| Abstract: | Using an uncontaminated fast component is a key for improving the reliability of quartz OSL dating for many deposits. So far no approach to extract the fast component of quartz OSL has routinely been adopted for dating practice. Key challenges for extracting fast components are (1) the difficulty of finding a unique solution in curve-fitting deconvolution of OSL decay curves and (2) the relatively poor dating precision when using experimental fast component extraction. Here, a simple mathematic solution for fast component extraction is presented that is not relying on curve-fitting deconvolution and can easily be adopted into routine dating practices. By using specifically selected data points from smoothed OSL decay curves, the precision of equivalent doses calculated using the extracted fast component can be improved over equivalent doses calculated using bulk OSL. The fast component extraction is tested on a group of age-constrained samples containing both insufficiently bleached and sufficiently bleached deposits. Fast component OSL ages are as accurate as bulk OSL ages for the sufficiently bleached deposits, but more accurate for samples where bulk OSL is affected by insufficient bleaching. We also demonstrate how using a curve smoothing procedure can improve dating precision in case of both sufficiently and insufficiently bleached deposits. |
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| Keywords: | OSL dating Fast component |
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