Non-invasive detection of pre explosive Ammonium Nitrate concealed in polymer containers by Deep Raman

Document Type : Original Article

Authors

Faculty of Applied Science, Malek Ashtar University of Technology, Iran

Abstract

Non-invasive detection of explosive materials concealed in the container is became one of the defense priorities, due to the increasing of organized crimes and terrorist activities. In this research, detection of ammonium nitrate(AN) concealed in common polymer containers such as polypropylene(PP) and high density polyethylene (HDPE) using different Deep Raman techniques such as spatial offset Raman spectroscopy (SORS), time-resolved Raman spectroscopy (TRRS) and the integration of these two techniques is known as time resolved spatially offset Raman spectroscopy(TR-SORS) has been performed. Since the ability to detection of explosives at a safe distance is a critical issue in the defense, a stand-off Deep Raman set-up at a distance of 5m was set up to detect AN concealed in HDPE container. The SORS ratio has been considered as a criterion, to evaluate the accuracy of the performance and to express a measure of the correctness of the qualitative identification, in all recorded spectra. This value in the TR-SORS technique for detection of AN in the PP container in the near distance, HDPE container in the near and far distance was 3.3, 11.5, and 3.5, respectively. The results of research showed that the integration of spatial offset Raman spectroscopy and time-resolved Raman spectroscopy will improve the SORS ratio, which is important in the safe identification of suspicious packages without harming the package and the user.

Keywords

Main Subjects

This is an open access article under the CC-BY-SA 4.0 license.( https://creativecommons.org/licenses/by-sa/4.0/)

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Applied Chemistry Today
Volume 18, Issue 66
April 2023
Pages 187-206

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