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Proceedings Paper

Laser-induced breakdown spectroscopy for the remote detection of explosives at level of fingerprints
Author(s): S. Almaviva; A. Palucci; V. Lazic; I. Menicucci; M. Nuvoli; M. Pistilli; L. De Dominicis
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Paper Abstract

We report the results of the application of Laser-Induced Breakdown Spectroscopy (LIBS) for the detection of some common military explosives and theirs precursors deposited on white varnished car’s external and black car’s internal or external plastic. The residues were deposited by an artificial silicon finger, to simulate material manipulation by terrorists when preparing a car bomb, leaving traces of explosives on the parts of a car. LIBS spectra were acquired by using a first prototype laboratory stand-off device, developed in the framework of the EU FP7 313077 project EDEN (End-user driven DEmo for CBRNe). The system operates at working distances 8-30 m and collects the LIBS in the spectral range 240-840 nm. In this configuration, the target was moved precisely in X-Y direction to simulate the scanning system, to be implemented successively. The system is equipped with two colour cameras, one for wide scene view and another for imaging with a very high magnification, capable to discern fingerprints on a target. The spectral features of each examined substance were identified and compared to those belonging to the substrate and the surrounding air, and those belonging to possible common interferents. These spectral differences are discussed and interpreted. The obtained results show that the detection and discrimination of nitro-based compounds like RDX, PETN, ammonium nitrate (AN), and urea nitrate (UN) from organic interfering substances like diesel, greasy lubricants, greasy adhesives or oils in fingerprint concentration, at stand-off distance of some meters or tenths of meters is feasible.

Paper Details

Date Published: 29 April 2016
PDF: 9 pages
Proc. SPIE 9899, Optical Sensing and Detection IV, 98990R (29 April 2016); doi: 10.1117/12.2225907
Show Author Affiliations
S. Almaviva, ENEA Diagnostics and Metrology Lab. (Italy)
A. Palucci, ENEA Diagnostics and Metrology Lab. (Italy)
V. Lazic, ENEA Diagnostics and Metrology Lab. (Italy)
I. Menicucci, ENEA Diagnostics and Metrology Lab. (Italy)
M. Nuvoli, ENEA Diagnostics and Metrology Lab. (Italy)
M. Pistilli, ENEA Diagnostics and Metrology Lab. (Italy)
L. De Dominicis, ENEA Diagnostics and Metrology Lab. (Italy)

Published in SPIE Proceedings Vol. 9899:
Optical Sensing and Detection IV
Francis Berghmans; Anna G. Mignani, Editor(s)

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