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First published online March 14, 2017

Long-Wave Infrared (LWIR) Molecular Laser-Induced Breakdown Spectroscopy (LIBS) Emissions of Thin Solid Explosive Powder Films Deposited on Aluminum Substrates

Abstract

Thin solid films made of high nitro (NO2)/nitrate (NO3) content explosives were deposited on sand-blasted aluminum substrates and then studied using a mercury–cadmium–telluride (MCT) linear array detection system that is capable of rapidly capturing a broad spectrum of atomic and molecular laser-induced breakdown spectroscopy (LIBS) emissions in the long-wave infrared region (LWIR; ∼5.6–10 µm). Despite the similarities of their chemical compositions and structures, thin films of three commonly used explosives (RDX, HMX, and PETN) studied in this work can be rapidly identified in the ambient air by their molecular LIBS emission signatures in the LWIR region. A preliminary assessment of the detection limit for a thin film of RDX on aluminum appears to be much lower than 60 µg/cm2. This LWIR LIBS setup is capable of rapidly probing and charactering samples without the need for elaborate sample preparation and also offers the possibility of a simultaneous ultraviolet visible and LWIR LIBS measurement.

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Published In

Article first published online: March 14, 2017
Issue published: April 2017

Keywords

  1. Laser-induced breakdown spectroscopy
  2. LIBS
  3. long-wave infrared spectra
  4. explosives

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© The Author(s) 2017.
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PubMed: 28374608

Authors

Affiliations

Clayton S.-C. Yang
Battelle Eastern Science and Technology Center, Aberdeen, MD, USA
Feng Jin
Brimrose Corporation of America, Baltimore, MD, USA
Sudhir B. Trivedi
Brimrose Corporation of America, Baltimore, MD, USA
Ei E. Brown
Department of Physics, Hampton University, Hampton, VA, USA
Uwe Hommerich
Department of Physics, Hampton University, Hampton, VA, USA
Ashish Tripathi
Edgewood Chemical Biological Center, Aberdeen Proving Ground, MD, USA
Alan C. Samuels
Edgewood Chemical Biological Center, Aberdeen Proving Ground, MD, USA

Notes

Clayton S.-C. Yang Battelle Eastern Science and Technology Center, Aberdeen, MD 21001, USA. Email: [email protected]

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