Correction of distorted X-ray absorption spectra collected with capillary sample cell

Hao Wang

doi:10.1007/s41365-023-01253-9

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Correction of distorted X-ray absorption spectra collected with capillary sample cell

ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS | Updated：2023-08-16

- Correction of distorted X-ray absorption spectra collected with capillary sample cell
- Nuclear Science and Techniques Vol. 34, Issue 7, Article number: 106(2023)
- Affiliations：
  
  1.Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  2.University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China
  3.School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
- Author bio：
  
  Guang Mo, mog@ihep.ac.cn
  * Zhong-Hua Wu, wuzh@ihep.ac.cn
- Funds：
- DOI：10.1007/s41365-023-01253-9
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Cite this article
Hao Wang, Yue-Cheng Lai, Jia-Jun Zhong, et al. Correction of distorted X-ray absorption spectra collected with capillary sample cell. [J]. Nuclear Science and Techniques 34(7):106(2023)
DOI：

Hao Wang, Yue-Cheng Lai, Jia-Jun Zhong, et al. Correction of distorted X-ray absorption spectra collected with capillary sample cell. [J]. Nuclear Science and Techniques 34(7):106(2023) DOI： 10.1007/s41365-023-01253-9.

摘要

Abstract

In certain exceptional cases, capillary samples must be used to measure X-ray absorption spectra (XAS). However, the inhomogeneous thickness of capillary samples causes XAS distortion. This study discusses the distortion and correction of the XAS curve caused by the inhomogeneous thickness of capillary samples. The relationship between the distorted XAS curve ,μ,’,d,eq, (measured values) and the real absorption coefficient ,μ,s,d,eq, (true values) of the sample was established. The distortion was slight and negligible when the vertical size (2,h,) of the X-ray beam spot was smaller than 60% of the capillary tube's inner diameter (2,R,in,). When ,h,/,R,in,>,1, X-ray leakage is inevitable and should be avoided during measurement. Partial X-ray leakage caused by an X-ray beam spot size larger than the inner diameter of the capillary tube leads to serious compressed distortion of the XAS curve. When ,h,/,R,in,<,1, the distorted XAS data were well corrected. Possible errors and their influence on the corrected XAS are also discussed. Simulations and corrections for distortions verify the feasibility and effectiveness of the corrected method.

关键词

Keywords

XASCapillaryCompression distortionCorrectionPython

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