Adams diffuse reflectance (0.35-2.5 microns)
Adams diffuse reflectance (0.35-2.5 microns)Directional hemispheric (diffuse) reflectance spectra of lunar samples measured by John B. Adams (currently at Department of Geological sciences, Washington University, Seattle, WA 98195). These data were acquired using a Beckman Dk-2A, using both gold and smoked MgO as standards, during the 1970's.
Examples of these spectra are reported in a series of science articles:
Adams, J. B. and T. B. McCord, Optical properties of mineral separates, glass, and anorthositic fragments from Apollo mare smaples, Proc. Lunar Sci. Conf., 2nd , 2183-2195, 1971b.
Adams, J. B. and T. B. McCord, Electronic spectra of pyroxenes and interpretation of telescopic spectra reflectivity curves of the moon, Proc. Lunar Sci. Conf., 3rd, 3024-3034, 1972.
Adams, J. B. and T. B. McCord, Vitrification darkening in the lunar highlands and indentification of Descartes material at the Apollo 16 sites, Proc. Lunar Sci. Conf., 4th, 163-177, 1973.
Adams, J. B. , C. M. Pieters, and T. B. McCord, Orange glass: Evidence for reginal deposits of pyroclastic origin on the Moon. Proc. Lunar Sci. Conf., 5th pp. 171-187, 1974.
Adams, J. B. and M. P. Charette, spectra evidence of highland rock types at Apollo 17: Evidence from Boulder 1, Station 2, Moon, 14, 483-498, 1975.
The original Directional Hemispheric (diffuse) reflectance spectra. No corrections have been applied to the wavelength values.
Directional hemisphere (diffuse) reflectance spectra with wavelength corrections based on interlaboratory comparisons for several samples. The function used was an inverse tangent relationship in energy space yielding a correction of between +10-15 nanometers in the .9 to 2.6 micron region. The error in the visible is negligible.