Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...583l..43g&link_type=abstract
The Astrophysical Journal, Volume 583, Issue 1, pp. L43-L45.
Astronomy and Astrophysics
Astronomy
3
Ism: Lines And Bands, Ism: Molecules, Methods: Laboratory
Scientific paper
We report infrared absorption spectra of hydrogenated amorphous carbon (HAC) deposits prepared in the presence of deuterium. Spectra of D:HAC and DAC are characterized by the appearance of additional features near 2175 cm-1 (4.6 μm) corresponding to stretching vibrations of CDn groups. These are accompanied by a weakening of absorption in the CHn absorption bands throughout the infrared. Laboratory data suggest that it may be possible to detect deuterium fractionations XD/H>=7.4×10-3 in carbonaceous dust along the line of sight to Galactic center sources via absorption within the CDn stretching band near 4.6 μm.
Duley Walter W.
Grishko V. I.
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