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HAC: Band Gap, Photoluminescence, and Optical/Near-Infrared AbsorptionWe report results of laboratory measurements which illustrate the wide range of physical properties found among hydrogenated amorphous carbon (HAC) solids. Within this range, HAC can match quantitatively the astronomical phenomena ascribed to carbonaceous coatings on interstellar grains. We find the optical band gap of HAC to be well correlated with other physical properties of HAC of astronomical interest, and conclude that interstellar HAC must be fairly hydrogen-rich with a band gap of E(sub g) is approx. greater than 2.0 eV.
Document ID
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Witt, Adolf N.
(Toledo Univ. OH United States)
Ryutov, Dimitri
(Toledo Univ. OH United States)
Furton, Douglas G.
(Rhode Island Coll. Providence, RI United States)
Date Acquired
August 17, 2013
Publication Date
October 1, 1996
Publication Information
Publication: From Stardust to Planetesimals: Contributed Papers
Subject Category
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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