Comparisons of equivalent dose values obtained with different protocols using a lacustrine sediment sample from Xuchang, China

• Published in: Radiation measurements Vol. 44; no. 5; pp. 512 - 516
• Main Authors: Nian, X.M., Zhou, L.P., Qin, J.T.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 01.05.2009; Elsevier
• Subjects: Earth sciences; Earth, ocean, space; Equivalent dose; Exact sciences and technology; Freshwater; Geochronology; Isotope geochemistry. Geochronology; Marine and continental quaternary; OSL dating; Protocols; Surficial geology; Xuchang Man; Far East; Asia; China; China, People's Rep; Protocols; Equivalent dose; Xuchang Man; OSL dating; bleaching; fine-grained materials; OSL; quartz; grains; saturation; lake sediments; luminescence; corrections; silicates; dating; archaeological sites; framework silicates
• ISSN: 1350-4487; 1879-0925
• DOI: 10.1016/j.radmeas.2009.06.002

Comparisons of seven protocols for equivalent dose ( D e) determination using the conventional optically stimulated luminescence (OSL) signal and the recuperation OSL (ReOSL) signal were made on a sample that is representative of a series of samples taken from a lacustrine sedimentary sequence at the archaeological site of Xuchang Man. Fine-grained quartz (4–11 μm) was extracted and the OSL signal was found to be dominated by the fast component. The D e values obtained using different protocols varied from 222 ± 4 Gy to 368 ± 8 Gy. The dose response curves were all fitted with a single saturating exponential function except in the case of the multiple-aliquot additive dose protocol with sensitivity correction for the recuperated OSL signal (ReMAAD). The characteristic saturation dose ( D 0) values obtained with the conventional OSL signal varied between 107 ± 6 Gy and 154 ± 7 Gy and showed no relationship with D e values. The ReMAAD dose response curve was linear, and yielded an equivalent dose of 269 ± 12 Gy. The ReMAAD protocol may potentially serve as a means of dating relatively older samples provided the bleaching at the time of deposition was complete.