Trevorah Ryan M, Chantler Christopher T, Schalken Martin J
School of Physics, University of Melbourne, Australia.
IUCrJ. 2019 May 10;6(Pt 4):586-602. doi: 10.1107/S2052252519005128. eCollection 2019 Jul 1.
One of the most common types of experiment in X-ray absorption spectroscopy (XAS) measures the secondary inelastically scattered fluorescence photon. This widespread approach has a dominant systematic of self-absorption of the fluorescence photon. The large impact of self-absorption compromises accuracy, analysis and insight. Presented here is a detailed self-consistent method to correct for self-absorption and attenuation in fluorescence X-ray measurements. This method and the resulting software package can be applied to any fluorescence data, for XAS or any other experimental approach detecting fluorescence or inelastically scattered radiation, leading to a general solution applicable to a wide range of experimental investigations. The high intrinsic accuracy of the processed data allows these features to be well modelled and yields deeper potential insight.
X射线吸收光谱法（XAS）中最常见的实验类型之一是测量二次非弹性散射荧光光子。这种广泛应用的方法存在荧光光子自吸收这一主要系统误差。自吸收的巨大影响损害了测量的准确性、分析能力和深入洞察能力。本文提出了一种详细的自洽方法，用于校正荧光X射线测量中的自吸收和衰减。该方法及由此产生的软件包可应用于任何荧光数据，无论是用于XAS还是任何其他检测荧光或非弹性散射辐射的实验方法，从而提供一种适用于广泛实验研究的通用解决方案。处理后数据的高固有精度使这些特征能够得到很好的建模，并能带来更深入的潜在洞察。
