The authors report the results of a measurement of the Rayleigh scattering cross section of methane, nitrogen and carbon dioxide using a pulsed laser beam. In a similar study Skowronek and Alayli (1979) reported a variation in the cross section with the duration of the laser pulse. In this work the authors have been unable to reproduce Skowronek and Alayli's result and conclude that there is no effect due to the pulse duration. Their measurements agree with the classical cross section within the experimental error (+or-10% to 15%).
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