Optical Constants for Terrestrial Analogs of Lunar Materials.
Abstract
Representative terrestrial analogs of the dominant lunar constituents plagioclase feldspar and pyroxene were selected, and the refractive, absorption and scattering components were determined separately in the range from 0.33 to 2.3 micrometers. A newly developed theory was employed to separate the absorption from the scattering based on thin section total reflectance and transmission measurements. The selected minerals were bytownite (Minnesota) and augit (Ontario, Canada); a comparison of their absorption peaks with those inferred from reflectance measurements on lunar samples reveal comparable bands at 2.0, 1.3, 1.0 to 0.9, 0.6 micrometer and the UV. The similarities indicate that the optical constants reasonably characterize the lunar surface material. Another result is the introduction of plagioclase as a possible candidate material causing the 0.6 micrometer feature in asteroids and in the interstellar medium. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1973
- Accession Number
- AD0764121
Entities
People
- Theodore Hilgeman
- Walter G. Egan
Organizations
- Grumman