Rayleigh volume scattering coefficients have been measured for Freon-12 (CCl2F2), Freon-22 (CHClF2), and sulphur hexafluoride (SF6) relative to air using an integrating spectronephelometer. The relative scattering ratios obtained are 15.78 ± 0.17, 7.69 ± 0.08, 6.79 ± 0.07, and 1.00, respectively, for CCl2F2, CHClF2, SF6, and air.
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A. W. Harrison (1977) studied this question.
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