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KETENE FORMATION IN INTERSTELLAR ICES: A LABORATORY STUDY
2013
Astrophysical Journal
The formation of ketene (H 2 CCO, ethenone) in polar and apolar ices was studied with in situ 0.8 MeV proton irradiation, far-UV photolysis, and infrared spectroscopic analyses at 10-20 K. Using isotopically enriched reagents, unequivocal evidence was obtained for ketene synthesis in H 2 O-rich and CO 2 -rich ices, and several reaction products were identified. Results from scavenging experiments suggested that ketene was formed by free-radical pathways, as opposed to acid-base processes or
doi:10.1088/0004-637x/773/2/109
fatcat:nw5d5k7fcbdazjl3qaxao3xhki