Analysis of optical bleaching of OSL signal in sediment quartz

• Published in: Radiation measurements Vol. 56; pp. 257 - 261
• Main Authors: PRZEGIETKA, K. R, CHRUSCINSKA, A
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 01.09.2013; Elsevier
• Subjects: Bleaching; Dating; Dating techniques; Earth sciences; Earth, ocean, space; Exact sciences and technology; Geochronology; Isotope geochemistry. Geochronology; Optically stimulated luminescence dating method; Quartz; Recognition; Sediment quartz; Sediments; Synthetic aperture radar; Sediment quartz; Optically stimulated luminescence dating method; Bleaching; experimental studies; bleaching; quartz; grains; quality; luminescence; standard samples; silicates; dating; framework silicates; Synthetic aperture radar
• ISSN: 1350-4487; 1879-0925
• DOI: 10.1016/j.radmeas.2013.02.009

The aim of this work was to study the effect of the quality of optical bleaching on the results of OSL (Optically Stimulated Luminescence) dating method. The large aliquots of coarse quartz grains extracted from fluvial deposit were used in the study. The poor, medium and good bleaching were simulated in laboratory with help of Blue LED light source in series of experiments. Then the samples were irradiated with a common laboratory dose. The equivalent doses (DE) were measured by the help of standard Single Aliquot Regeneration (SAR) technique, but obtained DE distributions are analyzed in a new way. The method for recognizing and compensating for partial bleaching is proposed. The conclusions for dating sediment quartz samples are presented and discussed. ► Bleaching experiments on sediment quartz are performed. ► Blue LED light source incorporated in luminescence reader is used. ► New analysis of data measured by standard SAR OSL technique is proposed. ► The results are promising for recognizing and compensating for partial bleaching.