Vol. 4, issue 06, article # 5

pdf Zaspa Yu. P., Kireev S. V., Protsenko E. D. Effect of air on the fluorescence of NO2 excited by a HE-NE laser. // Atmospheric and oceanic optics. 1991. V. 4. No. 06. P. 434-438.
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The collisional quenching due to air of the NO2 fluorescence excited by a He–Ne laser (633 nm) has been investigated for the air pressures varying from 0.1 to 750 mm Hg . It has been found that at the air pressures of the order of magnitude of 100 mm Hg or more the quenching efficiency increases due to triple collisions of the excited NO2 molecules with the air molecules. The constants for quenching NO2 fluorescence in the process of double and triple collisions with the molecules of air, molecular oxygen, and neon have been found. The dependence of the coefficient of resonance absorption due to NO2 (at the laser frequency) on the pressure of air has been measured.