The effect of test dose and first IR stimulation temperature on post-IR IRSL measurements of rock slices
The effect of test dose and first IR stimulation temperature on post-IR IRSL measurements of rock slices
复制标题
测试剂量和首次红外刺激温度对岩石切片后红外 IRSL 测量的影响
DOI：
10.1515/geochr-2015-0049
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发表时间：
2016
期刊：
影响因子：
1.2
通讯作者：
Mayank Jain
中科院分区：
文献类型：
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作者：
Jinfeng Liu;Andrew Murray;Reza Sohbati;Mayank Jain
摘要光激发发光技术(OSL)越来越多地应用于岩石表面的测年。目前还没有一种实用的方法可以将纯矿物(石英和长石)从坚硬岩石中分离出来用于OSL测量而不丢失与颗粒大小相关的剂量信息，而且关于单等份再生剂量(SAR)测量协议对岩石切片的后红外受激发光(PIIR)信号的性能的信息也很少。后者在这里进行了研究。我们的数据表明，当再生剂量首先按递增顺序给出，然后按递减顺序给出时，剂量响应曲线饱和度(或DO)随试验剂量大小而有系统地增加。如果这些顺序颠倒，这种趋势就会消失。剂量反应曲线的重复性取决于试验剂量的大小(小试验剂量较差)。对于在实验室给出饱和剂量的岩片，观察到灵敏度校正的pIR290信号接近剂量响应曲线的饱和水平，对于50到250°C的首次IR刺激。然而，来自自然饱和切片的pIR290信号只有在较高的首次IR刺激温度(例如200°C或250°C)时才接近实验室饱和水平。我们的数据证实了早先基于砂粒测量的建议，对于较老的样品，接近饱和的精确测量需要使用更高的第一IR温度。
Abstract Optically stimulated luminescence (OSL) is increasingly applied to the dating of rock surfaces. There is at present no practical way of separating pure minerals (quartz and feldspar) from hard rocks for OSL measurement without losing the grain-size dependent dosimetric information and there is little information about the performance of the single-aliquot regeneration-dose (SAR) measurement protocol on the post-infrared infrared stimulated luminescence (pIRIR) signals from rock slices. The latter is investigated here. Our data indicate that there is a systematic increase in dose response curve saturation (or Do) with test dose size when the regeneration doses are first given in increasing order, and then decreasing order. This trend disappears if these orders are reversed. The reproducibility of dose response curves is dependent on the size of the test dose (poorer for small test dose). For rock slices given a saturation dose in the laboratory, it is observed that the sensitivity corrected pIRIR290 signal lies close to saturation level of the dose response curve, for first IR stimulation at temperatures between 50 and 250°C. However, the pIRIR290 signal from naturally saturated slices lies close to the laboratory saturation levels only for higher first IR stimulation temperatures e.g. 200°C or 250°C. Our data confirm earlier suggestions based on sand-grain measurements that, for older samples, accurate measurements close to saturation require that a higher first IR temperature is used.
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影响因子：
2.7
作者：
Bo Li;Sheng‐Hua Li
通讯作者：
Bo Li;Sheng‐Hua Li
影响因子：
2
作者：
K. Thomsen;A. Murray;M. Jain;L. Bøtter-Jensen
通讯作者：
K. Thomsen;A. Murray;M. Jain;L. Bøtter-Jensen
影响因子：
2
作者：
J. Qin;Liping Zhou
通讯作者：
J. Qin;Liping Zhou
影响因子：
2
作者：
R. Sohbati;A. Murray;M. Jain;K. Thomsen;Seongchan Hong;K. Yi;Jeong-Heon Choi
通讯作者：
R. Sohbati;A. Murray;M. Jain;K. Thomsen;Seongchan Hong;K. Yi;Jeong-Heon Choi
影响因子：
2.2
作者：
通讯作者：
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