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

作者：Charles M. Wynn, Stephen T. Palmacci, Roderick Russell Kunz, M. Rothschild · 发表于：Optics Express · 年份：2010 · DOI：10.1364/oe.18.005399 · 被引用次数：56 · 研究领域：Energetic Materials and Combustion、Mass Spectrometry Techniques and Applications、Advanced Chemical Physics Studies

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 (approximately 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.