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首页> 外文期刊>International journal of PIXE >FLUORINE AND CALCIUM PROFILING BY PIGE/PIXE FOR EXPOSURE AGE DATING IN ARCHAEOLOGY
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FLUORINE AND CALCIUM PROFILING BY PIGE/PIXE FOR EXPOSURE AGE DATING IN ARCHAEOLOGY

机译:配剂/胶粉对氟和钙的曝晒年龄定年

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摘要

Fossil fragments of bone and teeth that are exposed to a humid environment take up fluorine from the surrounding soil and accumulate it in their mineral phase. In cortical parts of long bone diaphysis a fluorine concentration profile can be observed, which carries information on the exposure duration of the buried object in its shape. The distribution of fluorine in a sample however is strongly influenced by environmentally induced processes of bone diagenesis, i.e. alteration in the structure and composition of bone mineral and degradation of the organic components that may make the time information indistinct. PIGE (Proton Induced Gamma-ray Emission) is a precise and fast analytical technique to determine the quantitative fluorine content and its distribution in cross sections of bone and tooth specimen non-destructively. The simultaneous detection of Ca by PIXE (Proton Induced X-ray Emission) provides additional information on the sample topography. Cracks, alteration haloes and the porosity, which is typical for human bone samples, are parameters which have direct influence on the fluorine uptake and transport during burial. This contribution outlines the combined approach of using PIGE and PIXE measurement to understand some aspects of the complex environmental impact that impedes exposure age dating by fluorine diffusion profiling.
机译:暴露在潮湿环境中的骨骼和牙齿的化石碎片会吸收周围土壤中的氟,并在其矿物质相中积累氟。在长骨骨干的皮质部分,可以观察到氟浓度分布图,其中包含了有关埋入物体形状的暴露持续时间的信息。然而,氟在样品中的分布受到环境诱导的骨成岩过程的强烈影响,即骨矿物质的结构和组成的改变以及有机成分的降解,这可能使时间信息不清楚。 PIGE(质子诱导的伽马射线发射)是一种精确而快速的分析技术,可以无损地确定定量氟含量及其在骨骼和牙齿样品横截面上的分布。通过PIXE(质子诱导X射线发射)同时检测Ca可以提供有关样品形貌的其他信息。裂纹,蚀变晕和孔隙率(这是人体骨骼样品的典型特征)是直接影响埋葬期间氟吸收和运输的参数。该文稿概述了使用PIGE和PIXE测量的组合方法,以了解复杂的环境影响的某些方面,这些方面会通过氟扩散曲线来阻止暴露年龄的确定。

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