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Updated: Mar 20, 2026
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Published on: August 9, 2022
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Determination of liquid's molecular interference function based on X-ray diffraction and dual-energy CT in security
1Department of Engineering Physics, Tsinghua University, Beijing 100084, China; Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, China.
Summary
This study introduces a new method to determine the molecular interference function (MIF) for unknown liquids using dual-energy CT and X-ray diffraction. This approach enhances accuracy and reduces sensitivity to noise in security screening applications.
Area of Science:
- Materials Science
- Analytical Chemistry
- Physics
Background:
- Accurate identification of unknown liquids is crucial for security screening.
- Existing methods for determining molecular properties can be sensitive to data limitations.
Purpose of the Study:
- To develop a novel method for deriving the molecular interference function (MIF) of unknown liquids.
- To improve the accuracy and robustness of liquid identification for security applications.
Main Methods:
- Reconstruction of effective atomic number using dual-energy computed tomography (CT).
- Estimation of equivalent molecular formula based on CT data.
- Derivation of MIF and effective atomic number from X-ray diffraction (XRD) profiles.
Main Results:
- The proposed method successfully derives the MIF and effective atomic number.
- The method demonstrates improved accuracy compared to traditional approaches.
- Results show reduced sensitivity to noise and data deficiencies in XRD profiles.
Conclusions:
- The combined CT-XRD approach offers a robust method for liquid characterization.
- This technique enhances the reliability of security screening for unknown substances.
- The method provides a more accurate molecular interference function for material analysis.
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