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Contact-free and fast detection of energetic materials in containments

  • The identification of energetic materials in containments is an important challenge for analytical methods in the field of safety and security. Opening a package without knowledge of its contents and the resulting hazards is highly involved with risks and should be avoided whenever possible. Therefore, preferable methods work non-destructive with minimal interaction and are capable of identifying target substances in a containment quickly and reliably. Most spectroscopic methods find their limits, if the target substance is shielded by a covering material. To solve this problem, a combined laser drilling method with subsequent identification of the target substance by means of Raman spectroscopic measurements through microscopic bore holes of the covering material is presented. A pulsed laser beam is used for both the drilling process and as an excitation source for Raman measurements in the same optical setup. Results show the ability of this new method to gain high-quality spectra even when performed through microscopic small bore channels. With the laser parameters chosen right, the method can even be performed on highly sensitive explosives like triacetone triperoxide (TATP). Another advantageous effect arises in an observed reduction in unwanted fluorescence signal in the spectral data, resulting from the confocal-like measurement setup with the bore hole acting as aperture.

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Document Type:Article
Author:Dominik Wild, Cathrin Theiß, Gerhard Holl
Parent Title (English):The European Physical Journal Plus
Article Number:437
Number of pages:6
Place of publication:Heidelberg
Publishing Institution:Hochschule Bonn-Rhein-Sieg
Date of first publication:2021/04/23
Copyright:© The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License.
Funding Information:Open Access funding enabled and organized by Projekt DEAL.
Departments, institutes and facilities:Institut für Detektionstechnologien (IDT)
Dewey Decimal Classification (DDC):5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Entry in this database:2021/04/24
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International