Abstract
The effect of velocity-changing gas-particle collisions on the intensity of the stimulated photon echo response is investigated. The intensity is influenced most by such collisions if the exciting-pulse wave vectors are nonparallel. An approximation of the intensity of the stimulated photon echo response as a function of the time interval between the second and third exciting laser pulses is proposed and enables differentiation of the contribution of velocity-changing particle collisions to attenuation of the response. The results are of interest for optical coherent echo spectroscopy.
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