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- W2034218303 abstract "ABSTRACT In this paper we report the quantitative oxygen quenching effect on laser-induced fluorescence of acetone, methyl ethyl ketone, and 3-pentanone at low pressures (∼700 torr) with oxygen partial pressures up to 450 torr. Nitrogen was used as a bath gas in which these molecular tracers were added in different quantities according to their vapor pressure at room temperature. These tracers were excited by using a frequency-quadrupled, Q-switched, Nd:YAG laser (266 nm). Stern–Volmer plots were found to be linear for all the tracers, suggesting that quenching is collisional in nature. Stern–Volmer coefficients (ksv) and quenching rate constants (kq) were calculated from Stern–Volmer plots. The effects of oxygen on the laser-induced fluorescence of acetone, methyl ethyl ketone, and 3-pentanone were compared with each other. Further, the Smoluchowski theory was used to calculate the quenching parameters and compared with the experimental results. KEYWORDS: diffusion coefficientfluorescence quenchingketonesLIFoxygen ACKNOWLEDGMENTS We would like to acknowledge the Dept. of Aerospace Engineering, Indian Institute of Science, Bangalore, for providing the experimental facility. We also thank all LHSW members for their support. The authors are grateful to Dr. J. Thipperudrappa, BNM Institute of Technology, Bangalore, for fruitful discussions. We gratefully acknowledge the financial support from DRDO. Notes a Reference 12. b Reference 24. a Stokes–Einstein relation (Eq. 7). b Using Chapman and Enskog relation (Eq. 8)." @default.
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- W2034218303 date "2013-10-21" @default.
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- W2034218303 title "Gas Phase Oxygen Quenching Studies of Ketone Tracers for Laser-Induced Fluorescence Applications in Nitrogen Bath Gas" @default.
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- W2034218303 doi "https://doi.org/10.1080/00387010.2013.775463" @default.
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