An Experimental Study Related to Dose Scattering on the Routinely Used Minerals with Comparison of Grain Sizes and Disks Materials

Abstract

The determination of the dose rate of a 90Sr/90Y radiation source prevalently used for luminescence dating studies was investigated over quartz, feldspar and polymineral aliquots in different grain sizes. These minerals are deposited over commonly used stainless-steel and aluminium discs. Luminescence dating includes protocols incorporating artificial irradiation, which is a considerably important point to understand the rate of the absorbed dose of the used samples. In this study, 90Sr/90Ybeta sources, which are housed within Elsec and Riso commercial luminescence readers were used to compare the dose absorption ratio on fine grain (<20µ) feldspar, polymineral pottery (<20µ) and coarse grain (90- 100µ) quartz. The absorbed dose rates were investigated using aluminium and stainless-steel discs with a thickness of 1 mm and a diameter of 1cm. Also backscatter and bremsstrahlung effects were experimentally investigated on stainless-steel and aluminium discs with the Ortec ZnS beta scintillation counter. As the result of this study, by comparing luminescence results dose absorption ratio by Riso’s beta source irradiation was seen lower than Elsec’s beta source irradiation. 

Keywords

• Bremsstrahlung,backscatter,luminescence,90Sr/90Y,beta irradiator.

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