This paper presents an energy-dispersive X-ray fluorescence (XRF) instrumentation mainly intended for the quantitative analysis of actinides based on their intense L X-ray lines. The experimental setup is equipped with a highly oriented pyrolytic graphite (HOPG) optic as a bandpass filter placed between a sample and a detection system. In such an arrangement, it modifies the spectral distribution of the fluorescence radiation and helps recording a spectrum in the energy range from 10 to 18 keV, while suppressing parts considered to be useless. In order to perform accurate quantitative analyses of the recorded spectra, the classical quantification algorithm based on the fundamental parameters (FP) must be adapted to take into account the effect of the HOPG optic on the measured intensities. This requires to determine the transmission function of the HOPG filter and implement it in the algorithm. The validity of this approach is checked in different application examples.

中文翻译：

---

使用配备高取向热解石墨过滤器的能量色散 X 射线荧光仪器进行定量元素分析

本文介绍了一种能量色散 X 射线荧光 (XRF) 仪器，主要用于基于锕系元素的强 L X 射线线进行定量分析。实验装置配备了高度定向的热解石墨 (HOPG) 光学元件，作为放置在样品和检测系统之间的带通滤波器。在这种布置中，它改变了荧光辐射的光谱分布并有助于记录能量范围为 10 到 18 keV 的光谱，同时抑制被认为无用的部分。为了对记录的光谱进行准确的定量分析，必须调整基于基本参数 (FP) 的经典量化算法，以考虑 HOPG 光学器件对测量强度的影响。这就需要确定HOPG滤波器的传递函数并在算法中实现。这种方法的有效性在不同的应用示例中得到检验。