New experiments and interpretations concerning the "XCN" band in interstellar ice analogues
R.L. Hudson 1 and
M.H. Moore 2
Received 7 October 1999 / Accepted 12 January 2000
Evidence for the formation of in interstellar ice analogues is summarized with an emphasis on the recent experiments of Demyk et al. (1998). Their experiments are reinterpreted in terms of two different types of chemical reactions, acid-base and oxidation-reduction. New spectra of UV-photolyzed and -irradiated ices are presented, and reasons for similarities considered. The role of and scavengers in revealing ice photo- and radiation chemistries is stressed, and it is concluded that electron-transfer reactions may play a more important role than commonly thought.
Key words: infrared: ISM: lines and bands ISM: molecules ISM: abundances molecular processes ISM: dust, extinction
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© European Southern Observatory (ESO) 2000
Online publication: June 5, 2000