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首页> 外文期刊>Quaternary geochronology >2D modelling: A Monte Carlo approach for assessing heterogeneous beta dose rate in luminescence and ESR dating: Paper I, theory and verification
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2D modelling: A Monte Carlo approach for assessing heterogeneous beta dose rate in luminescence and ESR dating: Paper I, theory and verification

机译：2D建模：一种蒙特卡罗评估亮度和ESR的异质β剂量率和ESR约会：纸张I，理论和验证

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摘要

Many samples used for luminescence and ESR dating show complex mineralogical structures, resulting in heterogeneous beta dose rates. Ideally, the beta dose rate distribution could be reconstructed using softwares like DosiVox, which can both upload 3D-scans recorded with X-ray tomography and distributions of radioactive elements. However, some minerals often exhibit only small X-ray contrasts making them difficult to distinguish in 3D-scans. For example, quartz and plagioclase have closely similar X-ray characteristics, which limit the applicability of this approach. Here, we introduced a Monte Carlo simulation of beta particles in two dimensions, in order to calculate the dose rate from 2D images. The simulation results are compared between 2D modelling, 3D modelling and standard calculation. The implications for beta dose rate heterogeneity in grains are discussed. Using the "DosiVox-2D" software, we show that 2D scans may characterize complex heterogeneous 3D beta dose rate distributions. This approach could lead to a better understanding of micro-dosimetric phenomena and the improvements in the accuracy of dose rate calculation for heterogeneous samples.
机译：用于发光和ESR序列的许多样品显示复杂的矿物学结构，导致异质β剂量率。理想情况下，可以使用像Dosivox等软件的软件重建β剂量率分布，这可以上传用X射线断层扫描和放射性元件的分布记录的3D扫描。然而，一些矿物通常只表现出小的X射线对比使它们难以区分3D扫描。例如，石英和Plagioclase具有非常相似的X射线特性，这限制了这种方法的适用性。在这里，我们在两个维度中引入了β颗粒的蒙特卡罗模拟，以便计算来自2D图像的剂量率。仿真结果在2D建模，3D建模和标准计算之间进行了比较。讨论了对谷物中的β剂量率异质性的影响。使用“Dosivox-2D”软件，我们表明2D扫描可以表征复杂的异构3Dβ剂量率分布。这种方法可能导致更好地了解微量剂量现象和改善异质样品的剂量率计算的准确性。

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