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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 6 — Mar. 15, 2010
  • pp: 5399–5406

Noncontact detection of homemade explosive constituents via photodissociation followed by laser-induced fluorescence

C. M. Wynn, S. Palmacci, R. R. Kunz, and M. Rothschild  »View Author Affiliations


Optics Express, Vol. 18, Issue 6, pp. 5399-5406 (2010)
http://dx.doi.org/10.1364/OE.18.005399


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Abstract

Noncontact detection of the homemade explosive constituents urea nitrate, nitromethane and ammonium nitrate is achieved using photodissociation followed by laser-induced fluorescence (PD-LIF). Our technique utilizes a single ultraviolet laser pulse (~7 ns) to vaporize and photodissociate the condensed-phase materials, and then to detect the resulting vibrationally-excited NO fragments via laser-induced fluorescence. PD-LIF excitation and emission spectra indicate the creation of NO in vibrationally-excited states with significant rotational energy, useful for low-background detection of the parent compound. The results for homemade explosives are compared to one another and 2,6-dinitrotoluene, a component present in many military explosives.

© 2010 OSA

OCIS Codes
(190.4180) Nonlinear optics : Multiphoton processes
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.3420) Remote sensing and sensors : Laser sensors
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:
Remote Sensing

History
Original Manuscript: January 4, 2010
Revised Manuscript: January 27, 2010
Manuscript Accepted: February 2, 2010
Published: March 1, 2010

Citation
C. M. Wynn, S. Palmacci, R. R. Kunz, and M. Rothschild, "Noncontact detection of homemade explosive constituents via photodissociation followed by laser-induced fluorescence," Opt. Express 18, 5399-5406 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-6-5399


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References

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