Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...359..246b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 359, Aug. 10, 1990, p. 246-255.
Astronomy and Astrophysics
Astrophysics
44
Carbonaceous Meteorites, Dielectric Properties, Electron Spectroscopy, Interstellar Matter, Deuterium, Electron Microscopy, Hydrogen, Interstellar Chemistry, Nitrogen, Xenon
Scientific paper
The results are reported of electron energy loss spectra (EELS) measurements on diamond residues from carbonaceous meteorites designed to elucidate the structure and composition of interstellar diamonds. Dynamic effective medium theory is used to model the dielectric properties of the diamonds and in particular to synthesize the observed spectra as mixtures of diamond and various pi-bonded carbons. The results are shown to be quantitatively consistent with the idea that diamonds and their surfaces are the only contributors to the electron energy loss spectra of the diamond residues and that these peculiar spectra are the result of the exceptionally small grain size and large specific surface area of the interstellar diamonds.
Bernatowicz Thomas J.
Gibbons Patrick C.
Lewis Roy S.
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