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Proceedings Paper

Femtosecond-laser-induced breakdown spectroscopy of explosives
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Paper Abstract

We use femtosecond laser-induced breakdown spectroscopy (LIBS) to detect trace amounts of TNT and RDX. A high-power pulsed laser is used in LIBS to form a plasma on the material surface and the optical emission from the plasma is spectrally analyzed to determine the material composition. Femtosecond LIBS results for TNT and RDX on aluminum substrates and glass slides are reported. Results are examined in terms of the optical properties of the substrate and the strong linear absorption for aluminum is contrasted with the weaker multiphoton absorption for glass. Optical microscope images of the ablated explosives are shown for femtosecond and nanosecond laser excitation. Fragmentation studies by femtosecond laser mass spectrometry are used to interpret LIBS results.

Paper Details

Date Published: 18 May 2006
PDF: 9 pages
Proc. SPIE 6217, Detection and Remediation Technologies for Mines and Minelike Targets XI, 62172A (18 May 2006); doi: 10.1117/12.672886
Show Author Affiliations
Yamac Dikmelik, Johns Hopkins Univ. (United States)
Caroline McEnnis, Johns Hopkins Univ. (United States)
James B. Spicer, Johns Hopkins Univ. (United States)


Published in SPIE Proceedings Vol. 6217:
Detection and Remediation Technologies for Mines and Minelike Targets XI
J. Thomas Broach; Russell S. Harmon; John H. Holloway, Editor(s)

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