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首页> 外文期刊>Quaternary geochronology >Absorbed dose, equivalent dose, measured dose rates, and implications for OSL age estimates: Introducing the Average Dose Model
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Absorbed dose, equivalent dose, measured dose rates, and implications for OSL age estimates: Introducing the Average Dose Model

机译：吸收剂量，当量剂量，测量剂量率和对OSL年龄估计的影响：引入平均剂量模型

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摘要

Luminescence ages are calculated by dividing an absorbed dose by the dose rate to which the natural dosimeter has been exposed. In practice, one measures an equivalent dose, De; in the absence of an alpha dose contribution, this should be indistinguishable from the dose absorbed in nature. Here we first review the relationship between absorbed dose, equivalent dose and dose rate, and the measurements that lead to their estimation; we restate that, in contrast to recent suggestions, an equivalent dose is not a physically different quantity from a beta or gamma dose absorbed by quartz grains. Statistical analysis of OSL data is of great importance when dealing with single grain data, since such data commonly exhibit significant scatter. However, dose rate measurements provide an arithmetic mean of dose rates absorbed by individual grains; in this article, we propose a new model to estimate the average dose absorbed by the grains. We thus introduce a new model for OSL age estimates: the Average Dose Model (ADM). We argue that ADM ages should be more accurate than Central Age Model (CAM) based ages, and we provide experimental evidence supporting this expectation. We also argue that the use of the Finite Mixture Model should be avoided. Finally, we discuss the implications for multi-grain age estimates derived from well-bleached samples. (c) 2017 Elsevier B.V. All rights reserved.
机译：发光年龄的计算方法是将吸收剂量除以自然剂量计暴露的剂量率。在实践中，一个测量等效剂量De；在没有α剂量贡献的情况下，这应该与自然界吸收的剂量无法区分。在这里，我们首先回顾了吸收剂量、等效剂量和剂量率之间的关系，以及导致其估算的测量；我们重申，与最近的建议相比，等效剂量与石英颗粒吸收的β或γ剂量在物理上没有区别。在处理单颗粒数据时，OSL数据的统计分析非常重要，因为此类数据通常表现出显著的分散性。然而，剂量率测量提供了单个颗粒吸收剂量率的算术平均值；在这篇文章中，我们提出了一个新的模型来估计颗粒吸收的平均剂量。因此，我们引入了一种新的OSL年龄估计模型：平均剂量模型（ADM）。我们认为ADM年龄应该比基于中心年龄模型（CAM）的年龄更准确，我们提供了支持这一预期的实验证据。我们还认为，应避免使用有限混合模型。最后，我们讨论了从漂白良好的样品中得出的多颗粒年龄估计的含义。（c） 2017爱思唯尔B.V.版权所有。

著录项

  • 来源
    《Quaternary geochronology》 |2017年第2017期|共11页
  • 作者

    Guerin G.; Christophe C.; Philippe A.; Murray A. S.; Thomsen K. J.; Tribolo C.; Urbanova P.; Jain M.; Guibert P.; Mercier N.; Kreutzer S.; Lahaye C.;

  • 作者单位

    Univ Bordeaux Montaigne IRAMAT CRP2A Maison Larcheol Esplanade Antilles UMR CNRS 5060 F-33607 Pessac France;

    Univ Bordeaux Montaigne IRAMAT CRP2A Maison Larcheol Esplanade Antilles UMR CNRS 5060 F-33607 Pessac France;

    Univ Nantes CNRS Jean Leray Lab Math LMJL UMR6629 Nantes France;

    Aarhus Univ Dept Geosci Nord Lab Luminescence Dating DTU Riso Campus DIC-4000 Roskilde Denmark;

    Tech Univ Denmark Ctr Nucl Technol DTU Riso Campus DK-4000 Roskilde Denmark;

    Univ Bordeaux Montaigne IRAMAT CRP2A Maison Larcheol Esplanade Antilles UMR CNRS 5060 F-33607 Pessac France;

    Univ Bordeaux Montaigne IRAMAT CRP2A Maison Larcheol Esplanade Antilles UMR CNRS 5060 F-33607 Pessac France;

    Tech Univ Denmark Ctr Nucl Technol DTU Riso Campus DK-4000 Roskilde Denmark;

    Univ Bordeaux Montaigne IRAMAT CRP2A Maison Larcheol Esplanade Antilles UMR CNRS 5060 F-33607 Pessac France;

    Univ Bordeaux Montaigne IRAMAT CRP2A Maison Larcheol Esplanade Antilles UMR CNRS 5060 F-33607 Pessac France;

    Univ Bordeaux Montaigne IRAMAT CRP2A Maison Larcheol Esplanade Antilles UMR CNRS 5060 F-33607 Pessac France;

    Univ Bordeaux Montaigne IRAMAT CRP2A Maison Larcheol Esplanade Antilles UMR CNRS 5060 F-33607 Pessac France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地球物理学;
  • 关键词

    OSL data analysis; Dose rate measurements; Central Age Model; Average Dose Model;

    机译：OSL数据分析;剂量率测量;中等时代模型;平均剂量模型;

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