Optical data of meteoritic nano-diamonds from far-ultraviolet to far-infrared wavelengths

Details Optical data of meteoritic nano-diamonds from far-ultraviolet to far-infrared wavelengths Optical data of meteoritic nano-diamonds from far-ultraviolet to far-infrared wavelengths

2004-08-10

arxiv.org/abs/astro-ph/0408178v1

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).

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