| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1237967 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2009 | 4 Pages |
Abstract
The photo-fragmentation cross-section of 2,4,6-trinitrotoluene (TNT) vapor at room temperature was determined at different ultraviolet wavelengths (254, 300, 340, and 400Â nm) by measuring the concentration of NO molecule with cavity ring down spectroscopy and correcting for the photo-fragmentation cross-section of NO2. Nitric oxide (NO) molecules are produced by the TNT photo-fragmentation processes via an intermediate production of NO2. Our results reveal that the photo-fragmentation cross-section of TNT changes appreciably with change in wavelength with xenon arc lamp illumination, increasing with decreasing excitation wavelength. The maximum value of cross-section was observed at the shortest photo-fragmentation wavelength studied (254Â nm), which is closest to the wavelength of an absorption peak of TNT near 220Â nm.
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Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ramesh C. Sharma, Tracy S. Miller, Alexander D. Usachev, Jagdish P. Singh, Fang-Yu Yueh, David L. Monts,