Abstract

The near-normal incidence reflectances for a ternary system composed of 75% H2SO4, 10% HNO3, and 15% H2O and for a 10% aqueous solution of HNO3 have been measured at ambient temperature over the spectral range of 5000 to 500 cm−1. A Kramers–Kronig phase-shift analysis of the measured spectral reflectance has been used to determine the real and imaginary components of the index of refraction for each sample. The ternary-system spectrum has been compared with the spectrum of 10% HNO3 and also with the spectrum of 75% H2SO4 obtained by Palmer and Williams. [ Appl. Opt. 14, 208 ( 1975)]. These results may prove useful for studies concerning aerosol formation of this ternary system in the stratosphere.

© 1986 Optical Society of America

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