Computer Science – Numerical Analysis
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...284..583c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 284, no. 2, p. 583-592
Computer Science
Numerical Analysis
13
Carbonaceous Materials, Diamonds, Interplanetary Dust, Microcrystals, Carbon Stars, Interstellar Extinction, Meteoroids, Numerical Analysis, Raman Spectra
Scientific paper
Among various carbonaceous grains which are expected to be present in space, submicron diamond particles have received particular attention recently. Laboratory analyses on fine-grained diamond residues extracted from primitive meteorites suggest that this component is one of the most abundant forms of circumstellar dust preserved in meteoritic samples. In addition, recent infrared spectroscopic observations seem to show a typical signature of diamonds in dense interstellar molecular clouds. Measurements on analog grains synthesized in the laboratory may provide experimental results useful to interpret both astronomical observations and laboratory data on meteoritic diamond residues. Following this line of attack to the problem of interstellar diamond characterization, in the present paper we report the results of systematic analyses performed on three soot samples which have been produced in the laboratory by means of detonation processes. As the explosion products contain a significant fraction of submicron diamond-like grains, we have analyzed the properties of the residues extracted from the soots by means of nitric and perchloic acid treatments. A variety of morphological, Raman and infrared laboratory analyses were performed. The results have been compared with data available in the literature for meteoritic samples to get new hints about the properties expected for diamond grains in the interstellar medium.
Bussoletti Ezio
Colangeli Luigi
Mennella Vito
Stephens John R.
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