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Radial laser-induced sound wave propagation and vibrational relaxation in carbon dioxide

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1 Author(s)
Davis, C.C. ; University of Maryland,College Park,MD

The effective vibrational relaxation time of CO2excited to the 00°1 level has been measured by the phase fluctuation Optical heterodyne technique. An apparent pressure dependence of the relaxation time can be attributed to the finite velocity of sound. This effect can be corrected to yield a value of p\tau = 7.6 \mu s . atm. The effect of laser-initiated cylindrical sound waves on the data is examined in some detail.

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Quantum Electronics, IEEE Journal of  (Volume:18 ,  Issue: 6 )