The Development and Its Applications of a Software Fitting Micro-X-Ray Fluorescence Spectrum Focused by Poly-Capillary Optics
SHUAI Qi-lin1, LIU Jun1, SHAO Jin-fa1, JIANG Qi-li1, LI Rong-wu2,3, PAN Qiu-li1,2,3, CHENG Lin1,3*
1. Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
2. Department of Physics, Beijing Normal University, Beijing 100875, China
3. Beijing Radiation Center, Beijing 100875, China
Abstract：The fitting software QMXRS (Quantitative analysis of Micro-Energy Dispersive X-ray fluorescence spectra) which is used for fitting micro-energy X-ray fluorescence spectrum focused by poly-capillary optics is developed in our Lab with Python language. The signal de-noising of the wavelet transform, background subtraction, energy calibration and characteristic peak fitting of spectrum is carried out by QMXRS. The ploy-capillary X-ray optics used here can improve the intensity of X-ray and change the distributions of X-ray fluorescence spectra. The background prediction model of QMXRS can effectively retain peak information and improve the accuracy of data processing of energy spectra. On the other hand, the constraint of the full width at half maximum(FWHM) of the Gaussian peak is added to the conventional nonlinear least-squares fitting. The Micro-Energy dispersive X-ray fluorescence spectra of the NIST 610 standard sample is used to demonstrate the performances of QMXRS. The results show that our QMXRS is better than PyMca and QXAS.
帅麒麟，刘 俊，邵金发，姜其立，李融武，潘秋丽，程 琳. 毛细管聚焦的X射线荧光光谱拟合软件的开发及应用[J]. 光谱学与光谱分析, 2021, 41(03): 714-719.
SHUAI Qi-lin, LIU Jun, SHAO Jin-fa, JIANG Qi-li, LI Rong-wu, PAN Qiu-li, CHENG Lin. The Development and Its Applications of a Software Fitting Micro-X-Ray Fluorescence Spectrum Focused by Poly-Capillary Optics. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(03): 714-719.
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