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Infrared fluorescence measurement of equilibrium and vibrational temperatures in laser‐irradiated gases

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3 Author(s)
Kleinman, Lawrence I. ; Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973 ; Weston, Ralph E. ; Flynn, George W.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.325485 

A calibrated two‐color temperature method has been developed for the measurement of time‐dependent temperatures in low‐pressure gases following laser excitation. Ratios of ir fluorescence signals arising from specific vibrational manifolds are used to determine the magnitude of laser heating, the vibrational temperatures of individual modes, and density fluctuations due to gasdynamic expansion following spatially inhomogeneous excitation. This technique has been applied to a prototype system consisting of SF6, SO2, and CH3F exposed to TEA CO2 laser excitation of the ν3 mode of SF6. Prior to V‐T/R relaxation, this system cannot be described by a single vibrational temperature.

Published in:

Journal of Applied Physics  (Volume:49 ,  Issue: 8 )

Date of Publication:

Aug 1978

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