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

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

187 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

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
Iaith wreiddiolSaesneg
Tudalennau (o-i)41-50
Nifer y tudalennau10
CyfnodolynRadiation Measurements
Cyfrol85
Dyddiad ar-lein cynnar30 Tach 2015
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 29 Chwef 2016

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