The Effect of Grain Size on Optically Stimulated Luminescence Decay Curves of Bulk Synthetic Quartz

Abstract

In the present research, the effect of the grain sizes of a bulk synthetic quartz sample on optically stimulated luminescence (OSL) decay curves was studied. The lots of the different grain sizes (125-105 μm, 105-90 μm, 90-74 μm, 74-63 μm, 63-53 μm, 53-44 μm, 44-37 μm, 37-25 μm) were exposed by different β-radiation prior optically stimulated luminescence measurements at room temperature and 160⁰C. The outcomes indicate that the OSL intensity increase up to the grain size 63-53 μm then decreases at room temperature but at 160⁰C the OSL intensity decrease below 105 μm. The fluctuation in OSL intensity with grain size was due to the combined effect of change in surface area and the increasing temperature. The dose-response curve log-log scale was plotted based on the β-radiation ranging from 2.63 Gy to 131.33 Gy for each grain size. The grain size 63 53 μm and 37-25 μm showed the superlinear behavior to sublinear of OSL signal respectively at 25⁰C and 160⁰C measurement.