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KMID : 0364920110360020052
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Journal of Radiation Protection and Research
2011 Volume.36 No. 2 p.52 ~ p.58
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OSL Age Determination of the Hearths in a Bronze Age Dwelling Site by using Bayesian Statistics
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Kim Myung-Jin
Yang Hye-jin
Hong Duk-Geun
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Abstract
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OSL dating for three hearths having the sequence of use and discard in No. 29 and 29-1 dwelling sites at Sogol cultural site was carried out. Resulting from the deconvolution of natural CW-OSL decay curve and thermal zeroing test, it was turned out that OSL signal was entirely composed of the heat- and light-sensitive fast component with high photoionization cross-section and all quartz OSL signals were thermally bleached under which is the minimum temperature related to heating and cooking in Bronze age. After dose recovery test and plateau test, paleodose of each hearth sample was evaluated by using SAR method, and OSL age was determined from the ratio of paleodose to annual dose rate. For the purpose of the precision improvement of OSL age, Bayesian statistics was applied to each hearth’s age and the archaeological sequence information. Finally, it could be concluded to the accurate use period of each hearth from the resultant OSL ages.
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KEYWORD
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OSL dating, Bayesian statistics, hearth, Bronze age
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