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
Original Manuscript: April 8, 1985
Manuscript Accepted: July 22, 1985
Published: January 1, 1986
R. W. Adams and H. D. Downing, "Infrared optical constants of a ternary system of 75% H2SO4, 10% HNO3, and 15% H2O," J. Opt. Soc. Am. A 3, 22-28 (1986)