Optical constants of sulfuric Acid; application to the clouds of venus?

Applied Optics
K F Palmer, D Williams

Abstract

With the purpose of obtaining the real and imaginary parts of the complex refractive index N; = n + ik, we have made quantitative measurements of spectral transmission and reflection of sulfuric acid solutions in the visible and near infrared. On the basis of the results, we have obtained values for n throughout the entire region and values of k in the near infrared together with upper limits for k in the visible region. These optical constants can be used to interpret the results of polarization studies of solar radiation that has been scattered by the clouds of Venus. We have Kramers-Kronig phase-shift analysis to obtain values of n and k from reflection measurements in the intermediate infrared region (400-4000 cm(-1)). Our measurements were made at 300 K on sulfuric acid solutions having concentrations by weight of 95.6, 84.5, 75, 50, 38, and 25%. If the particles in the Venus clouds consist of liquid droplets of sulfuric acid at a temperature of 250 K, comparison of existing Venus data with our data suggests that the acid concentration is probably higher than 70%. Various possibilities are discussed.

References

Feb 1, 1974·Science·A T Young

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Citations

Sep 7, 2001·Journal of Geophysical Research·K O PopeB A Ivanov
Jun 9, 2015·Astrobiology·Amit MisraSteven Sholes
Jun 17, 2016·Scientific Reports·Chao LiuYan Yin
Apr 21, 2018·Astrobiology·David C CatlingShawn Domagal-Goldman
Jun 14, 2003·Astrobiology·Elisabetta PierazzoLisa C Sloan
Mar 6, 2003·Applied Optics·Maurice A JarzembskiDean R Cutten
May 4, 2004·Applied Optics·Cathrine E Lund MyhreClaus J Nielsen
Jun 1, 1977·Applied Optics·H R CarlonI Sindoni
Dec 1, 2018·Atmospheric Measurement Techniques·Zhong ChenMatthew DeLand
Jul 13, 2006·The Journal of Physical Chemistry. a·C E Lund MyhreC J Nielsen
Oct 24, 2008·The Journal of Physical Chemistry. a·Robert WagnerVolker Ebert
Feb 1, 2018·Environmental Science & Technology·Tomoki NakayamaYutaka Matsumi
Sep 28, 2021·Astrobiology·Rakesh MogulMichael Pasillas

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