Rayleigh-Brillouin spectra of gaseous N₂ is measured for light scattered at 15^∘{} over a pressure range from 1 to 661 Torr. Spectral profiles are analyzed by means of an appropriate kinetic model. A least-χ² method determines the optimum values of the theory parameters: total collision frequency and rotational relaxation number. These parameters are compared with values obtained by other methods. Information provided by light-scattering measurements concerning rotational relaxation in dilute systems is discussed.
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Sandoval et al. (1976) studied this question.
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