Laboratory investigations of irradiated acetonitrile-containing ices on an interstellar dust analog

Ali Abdulgalil, Demian Marchione, Alex Rosu-Finsen, Mark Collings, Martin McCoustra

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Reflection-absorption infrared spectroscopy is used to study the impact of low-energy electron irradiation of acetonitrile-containing ices, under conditions close to those in the dense star-forming regions in the interstellar medium. Both the incident electron energy and the surface coverage were varied. The experiments reveal that solid acetonitrile is desorbed from its ultrathin solid films with a cross section of the order of 10(-17) cm(2). Evidence is presented for a significantly larger desorption cross section for acetonitrile molecules at the water-ice interface, similar to that previously observed for the benzene-water system.
Original languageEnglish
Article number041505
JournalJournal of Vacuum Science and Technology A
Volume30
Issue number4
DOIs
Publication statusPublished - Jul 2012

Keywords

  • Amino-acids
  • Methyl Cyanide
  • Radio-emission
  • Comet-Kohoutek
  • Films
  • Desorption
  • Surfaces
  • Benzene
  • Pt(111)
  • HCN

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