Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-08-10
Astron.Astrophys. 423 (2004) 983
Astronomy and Astrophysics
Astrophysics
11 pages, 7 figures
Scientific paper
10.1051/0004-6361:20034544
We have used different spectroscopic techniques to obtain a consistent quantitative absorption spectrum of a sample of meteoritic nano-diamonds in the wavelength range from the vacuum ultraviolet (0.12 $\mu$m) to the far infrared (100 $\mu$m). The nano-diamonds have been isolated by a chemical treatment from the Allende meteorite (Braatz et al.2000). Electron energy loss spectroscopy (EELS) extends the optical measurements to higher energies and allows the derivation of the optical constants (n & k) by Kramers-Kronig analysis. The results can be used to restrain observations and to improve current models of the environment where the nano-diamonds are expected to have formed. We also show that the amount of nano-diamond which can be present in space is higher than previously estimated by Lewis et al. (1989).
Andersen Anja C.
Braatz A.
Henning Th
Jaeger C.
Mutschke Harald
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