Other
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011adspr..48.1274d&link_type=abstract
Advances in Space Research, Volume 48, Issue 7, p. 1274-1278.
Other
2
Scientific paper
A laboratory experiment helps to understand the light scattering property of regolith like samples with known compositions and other physical parameters. The laboratory data so obtained can be compared with the existing in situ data on celestial objects like asteroids. Further, it may be analyzed with the help of various theoretical models to understand the light scattering processes from regolith more clearly. In this work we have performed laboratory based photometry of the light scattered from the surfaces of powdered alumina (Al 2 O 3 ) at various tilt angles of the sample and at large phase angles, with the particles having diameter 0.3 μm. The wavelength of observation was 632.8 nm. These data have been fitted by a surface scattering model originally suggested by Hapke. Instead of using empirical Henyey-Greenstein phase function to fix the values of albedo and phase function to be used within Hapke formula, we have used Mie theory for the same. This approach helped us to determine the single particle properties such as particle diameter and complex refractive index from surface scattering phase curve alone. Mie theory depends only on the size parameter X (=2 π (radius/wavelength)) and complex refractive index ( n , k ) of the material. Since the absorption coefficient ( k ) for alumina is known to be very low but not exactly zero, the best fit to the experimental data was obtained by least square technique with k as a free parameter, as the other parameters are known. Finally, we compare our results with other published results and discuss the scope of application of the method we adopted.
Das H. S.
Deb Debabrata
Gupta Rachana
Sen Asok Kumar
No associations
LandOfFree
The photometric study of light scattering from the surface of alumina powder and interpretations by Hapke formula does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The photometric study of light scattering from the surface of alumina powder and interpretations by Hapke formula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The photometric study of light scattering from the surface of alumina powder and interpretations by Hapke formula will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1813774