Laser-induced fluorescence of PO-photofragments of organophosphates
S.M. Bobrovnikov1,2, E.V. Gorlov1,2, V.I. Zharkov1, A.D. Safyanov1,2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2National Research Tomsk State University, Tomsk, Russia
Keywords: organophosphates, laser fragmentation, phosphorus oxide, PO-fragment, laser-induced fluorescence
Abstract
Results of calculating the spectrum of phosphorus monoxide (PO) fluorescence bands are presented. It is shown that the use of excitation radiation with wavelengths near the bandheads of the ( P22 + Q12) and P12 branches of the A2Σ+ ( v ′ = 0) - X2Π3/2 ( v ″ = 0) band provides a spectral separation of the γ (0, 1) PO fluorescence band and the vibrational-rotational Raman spectrum of oxygen. The spectra of the γ (0, 1) fluorescence band of PO fragments of dimethylmethylphosphonate and the vibrational-rotational band of spontaneous Raman scattering on atmospheric oxygen molecules were experimentally obtained under exposure to KrF-laser radiation at a wavelength of 247.78 nm. It is shown that the results of calculations of the shape and position of the fluorescence spectra are in good agreement with the experimental data.
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