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

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Natural and laboratory TT-OSL dose response curves: testing the lifetime of the TT-OSL signal in nature. / Chapot, M. S.; Roberts, H. M.; Duller, G. A. T.; Lai, Z. P.

In: Radiation Measurements, Vol. 85, 02.2016, p. 41-50.

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@article{6e2463c6c7e044c1b8c8adc302b60c0c,
title = "Natural and laboratory TT-OSL dose response curves: testing the lifetime of the TT-OSL signal in nature",
abstract = "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",
keywords = "natural DRC, TT-OSL, thermal stability, Chinese loess, quartz",
author = "Chapot, {M. S.} and Roberts, {H. M.} and Duller, {G. A. T.} and Lai, {Z. P.}",
year = "2016",
month = feb,
doi = "10.1016/j.radmeas.2015.11.008",
language = "English",
volume = "85",
pages = "41--50",
journal = "Radiation Measurements",
issn = "1350-4487",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Natural and laboratory TT-OSL dose response curves: testing the lifetime of the TT-OSL signal in nature

AU - Chapot, M. S.

AU - Roberts, H. M.

AU - Duller, G. A. T.

AU - Lai, Z. P.

PY - 2016/2

Y1 - 2016/2

N2 - 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

AB - 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

KW - natural DRC

KW - TT-OSL

KW - thermal stability

KW - Chinese loess

KW - quartz

UR - http://hdl.handle.net/2160/36430

U2 - 10.1016/j.radmeas.2015.11.008

DO - 10.1016/j.radmeas.2015.11.008

M3 - Article

VL - 85

SP - 41

EP - 50

JO - Radiation Measurements

JF - Radiation Measurements

SN - 1350-4487

ER -

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