Physics
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27...39a&link_type=abstract
Lunar and Planetary Science, volume 27, page 39
Physics
Ellipsometry, Mars: Analogs, Optical Constants, Planets: Surface, Reflectance Spectroscopy
Scientific paper
Infrared reflectance spectra of particulate mineral samples depend on particle size and porosity. Analysis of remotely sensed infrared spectroscopic data requires the study of particle size effects on the spectral properties. Therefore, reflectance spectra of quartz size separates and the optical constants n and k have been measured. The relationships between spectral features, the optical constants and the Mie single scattering efficiencies are discussed. Variation of spectral features as a function of the particle size in relation to the optical constants allows us to identify at least 4 different cases of scattering and absorption behavior: (1) n=1, k is small, (2) k is large, n undergoes rapid change in the range of anomalous dispersion, (3) n < 1, k is low and (4) k is low and n >1.
Arnold Gabriele E.
Bishop Janice L.
Junghans K.
Schade Ulrich
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