Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol
Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol
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DOI：
10.1016/s1350-4487(99)00253-x
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发表时间：
2000-02-01
影响因子：
2
通讯作者：
Wintle, AG
中科院分区：
文献类型：
--
作者：
Murray, AS;Wintle, AG
现在，单等份协议被广泛用作测量加热材料和沉积材料的石英和长石光受激发光 (OSL) 测年中的等效剂量 (D-e) 的方法。其中最新的是单等分再生剂量 (SAR) 方案，最初由 Murray 和 Roberts 提出（RadiationMeasurements 29, 503-515, 1998）。在此方法中，使用对后续测试剂量（D-e 的 10-20%）的 OSL 响应来校正每个自然或再生剂量 OSL 测量的灵敏度变化。如果灵敏度校正足够，则校正后的 OSL 响应应独立于先前的剂量和热/光学治疗，即重新测量时灵敏度校正的剂量反应曲线不应发生变化。在这里，我们检查灵敏度校正生长曲线作为剂量函数的解释，以及改变测量条件（例如预热温度、最小剂量大小、刺激温度）对 D-e 估计的影响。明确测试了剂量响应对先前治疗的依赖性，并讨论了热传递的重要性。结论是，现在可用于石英的强大 SAR 协议，并且适用于各种加热和未加热材料。 (C) 2000 Elsevier Science Ltd. 保留所有权利。
Single aliquot protocols are now widely used as a means of measuring the equivalent dose (D-e) in quartz and feldspar optical stimulated luminescence (OSL) dating of both heated and sedimentary materials. The most recent of these is the single-aliquot regenerative-dose (SAR) protocol, first suggested by Murray and Roberts (Radiation Measurements 29, 503-515, 1998). In this approach, each natural or regenerated dose OSL measurement is corrected for changes in sensitivity using the OSL response to a subsequent test dose (10-20% of D-e). If the sensitivity correction is adequate, then the corrected OSL response should be independent of prior dose and thermal/optical treatment, i.e. there should be no change in the sensitivity-corrected dose-response curve on remeasurement. Here we examine the interpretation of the sensitivity corrected growth curve as a function of dose, and the effect of changing measurement conditions (e.g. preheat temperature, size of lest dose, stimulation temperature) on the estimation of D-e. The dependence of the dose response on prior treatment is tested explicitly and the significance of thermal transfer discussed. It is concluded that a robust SAR protocol is now available for quartz, and that it is applicable to a wide range of heated and unheated materials. (C) 2000 Elsevier Science Ltd. All rights reserved.