THE ULTRAVIOLET-SPECTRA OF THIN EVAPORATED-FILMS OF CARBONACEOUS CHONDRITE

Absorption spectra in the visible to the near ultraviolet were measure d on the Belgica chondrite B-7904 in a form of thin solid film made by the vacuum evaporation. The spectra obtained exhibit a sharp peak at 226 nm and a broad bump around 280nm. These features were found ansin g from the meteorite component FeS (troilite). The peak at 226 nm show s a doublet structure with the band-width considerably narrower than t he 217.5 nm feature in the interstellar extinction. The absorption spe ctra obtained previously with the pulverized chondrites suspended in a liquid were also found reproducible by the pulverized FeS.