Natural and laboratory TT-OSL dose response curves: testing the lifetime of the TT-OSL signal in nature

M. S. Chapot, H. M. Roberts, G. A. T. Duller, Z. P. Lai

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This study compares natural and laboratory generated thermally transferred optically stimulated luminescence (TT-OSL) dose response curves (DRCs) for fine-grain quartz extracts from the Luochuan loess section in central China. Both DRCs saturate at high doses relative to the quartz OSL signal; the natural TT-OSL DRC saturates at about 2200 Gy and laboratory DRCs saturate at about 2700 Gy. However, the natural and laboratory TT-OSL DRCs deviate from one another at circa 150 Gy resulting in TT-OSL equivalent dose underestimation relative to palaeodoses expected from dose rates and independent age control. The lifetime of the TT-OSL signal at 10 °C, calculated from values of trap parameters E and s, is compared against the value for lifetime of the TT-OSL signal in nature at average burial temperature as determined from the age underestimation caused by deviation of the natural and laboratory generated DRCs. These two independent assessments of TT-OSL signal lifetime at Luochuan give similar values, suggesting that laboratory measurements of thermal stability reflect natural burial lifetimes and can potentially be used to correct TT-OSL ages for the difference between natural and laboratory dose response curves
Original languageEnglish
Pages (from-to)41-50
Number of pages10
JournalRadiation Measurements
Early online date20 Dec 2015
Publication statusPublished - 01 Feb 2016


  • Chinese loess
  • Natural DRC
  • Quartz
  • TT-OSL
  • Thermal stability


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