Optical spectra of amorophous carbon grains

Extinction coefficient measurement of amorphous carbon grain, produced by hydrocarbon buring, have been carried out at room temperature in the spectral range from 1900 Å to 2.5 . The classical KBr pellet technique has been used to obtain quantitative data. Corrections to accout for matrix distorsion of the spectrum have been determined experimentally by measuring the spectrum of the same grains deposited on a thin quartz plate.