Title

Atmosphere Issues In Detection Of Explosives And Organic Residues

Keywords

Atomic spectroscopy; Explosive residues; Laser induced breakdown spectroscopy; Molecular spectroscopy; Organic residues; Principal component analysis; Receiver operator characteristics curves

Abstract

This study makes a comparison of LIBS emission from molecular species in plasmas produced from organic residues on a non-metallic substrate by both a 5 ns Nd: YAG laser (1064 nm) and a 40 fs Ti: Sapphire laser (800 nm) in air and argon atmospheres. The organic samples analyzed had varying amounts of carbon, nitrogen, hydrogen, and oxygen in their molecular structure. The characterization was based on the atomic carbon, hydrogen, nitrogen, and oxygen lines as well as the diatomic species CN (B2σ+ - X2S+) and the C2 (d3πg - a3πu). Principal Component Analysis (PCA) was used to identify similarities of the organic analyte via the emission spectra. The corresponding Receiver Operating Characteristics (ROC) curves show the limitations of the PCA model for the nanosecond regime in air. ©2009 SPIE.

Publication Date

9-7-2009

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

7304

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.819243

Socpus ID

69549117006 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/69549117006

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