Anomalous fading of the IRSL signal of polymineral grains in Chinese loess
作者： S.G. Kang , X.L. Wang , X.N. Li , Y.C. Lu
DOI: 10.1016/J.RADMEAS.2009.08.006
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摘要: Abstract Laboratory storage and preheating experiments were carried out to study anomalous fading of infrared stimulated luminescence (IRSL) signals derived from polymineral grains extracted Chinese loess. Results laboratory at 150 °C higher temperature showed that such thermal treatments could lessen the effect indicated presence both non-thermal fading. In addition, behavior natural over past 9–170 ka was investigated. By comparing with independent ages (obtained fine-grain quartz using optically (OSL) signal for 130 ka thermally transferred OSL (TT-OSL) in age range 130–170 ka) same samples, equivalent doses obtained IRSL found be underestimated by different amounts since penultimate glacial; there a linear dependence when underestimation plotted against geological time.
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