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X‐ray fluorescence spectroscopy and Monte Carlo simulation for quantitative characterization of Bolivian pre‐Hispanic golden artefacts
X-Ray Spectrometry ( IF 1.2 ) Pub Date : 2020-09-18 , DOI: 10.1002/xrs.3196
Fabio L. Melquiades 1 , Sandro V. Santos 1 , Fabio Lopes 1 , Juan Villanueva 2 , Jorge L. Ticona 3 , Carlos R. Appoloni 1
Affiliation  

The quantification of archaeological artefacts with X‐ray Fluorescence is quite complex because it demands some calibration procedure. It is also rather more challenging when the customization of the portable equipment for in situ measurements is required. The objective of this study was to introduce a quantitative method by performing a calibration curve for a ternary gold alloy (Au, Ag and Cu). Fast Monte Carlo simulation combined with in situ portable XRF (pXRF) measurements in order to circumvent the calibration requirement using standard reference materials was used. Measurements with a laboratory‐made equipment were taken from a set of 16 pre‐hispanic gold alloy artefacts of a collection from the Museo Nacional de Etnografia y Folklore, La Paz, Bolivia. The spectra simulation was conducted with the XMI‐MSIM software.The results demonstrated that the combined use of pXRF measurements and spectra simulation via Monte Carlo is a feasible method for gold alloy quantification. In the examined samples, the Cu content was below 5% and for Au it ranged from 13 to 100%. Moreover, some peculiarities of the artefacts archaeological context were discussed.

中文翻译:

X射线荧光光谱和蒙特卡洛模拟对玻利维亚西班牙裔前金制品的定量表征

用X射线荧光对考古文物进行量化非常复杂,因为它需要一些校准程序。当需要针对现场测量定制便携式设备时,这也更具挑战性。本研究的目的是通过对三元金合金(Au,Ag和Cu)执行校准曲线来引入定量方法。为了避免使用标准参考材料的校准要求,使用了快速蒙特卡洛模拟与现场便携式XRF(pXRF)测量相结合的方法。使用实验室制造的设备进行的测量是从玻利维亚拉巴斯的国立民族博物馆和民俗博物馆收藏的一组16种西班牙前金合金制品中进行的。光谱模拟是使用XMI-MSIM软件进行的。结果表明,结合使用pXRF测量和通过Monte Carlo进行光谱模拟是一种可行的金合金定量方法。在检查的样品中,Cu含量低于5和Au的范围从13到100 。此外,还讨论了文物考古背景的一些特殊性。
更新日期:2020-09-18
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