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Laboratory Synthesis of Astrophysical Molecules

A new UCL apparatus
  • Anita Dawes
  • Nigel J Mason
  • Petra Tegeder
  • Philip Holtom
Part of the Physics of Atoms and Molecules book series (PAMO)

Abstract

A prototype apparatus has been constructed to study the synthesis of molecules on or within thin icy mantles under simulated interstellar, planetary and atmospheric environments. Molecular synthesis is stimulated by photon (4 – 13 eV lamp or synchrotron radiation), electron (< 20 eV) and ion (keV-MeV) irradiation. Products are probed by a combination of UV-Vis, FTIR and VUV spectroscopy. The first results of photoabsorption experiments of VUV irradiated water ice have shown evidence of photolysis and possible luminescence effects. These results are discussed and proposals for future experiments made

Key words

Astrobiology Molecular Synthesis Dust Grains Interstellar Medium Dissociative Electron Attachment Photolysis 

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6. References

  1. Allamandola L.J., Sandford S.A. Laboratory Simulation of Dust Spectra. Dust in the Universe: Proceedings of a Conference at the Department of Astronomy, University of Manchester, 14–18 December 1987; Edited by Bailey M.E., Williams DA.; Cambridge University PressGoogle Scholar
  2. Allamandola L.J., Sandford S.A., Valero G.J. Photochemical and thermal evolution of interstellar/precometary ice analogs. ICARUS 1998; 76:225–252CrossRefADSGoogle Scholar
  3. Baragiola R.A., Atteberry C.L., Bahr D.A. Jakas M.M. Solid-state ozone synthesis by energetic ions. Nucl Instrum Methods Phys Res, Sect B 1999; 157:233–238CrossRefGoogle Scholar
  4. Borget F., Chiavassa T., Allouche A., Aycard J.P. Experimental and quantum study of absorption of ozone (O3) on amorphous water ice. J Phys Chem 2001; 105:449–454Google Scholar
  5. Charnley S.B., Ehrenfreund P., Kuan Y.J. Spectroscopic diagnostics of organic chemistry in the protostellar environment. Spectrochim Acta Part A 2001; 57:685–704CrossRefADSGoogle Scholar
  6. Dumas C., Terrile R.J., Brown R.H., Schneider G., Smith B.A. Hubble Space Telescope NICMOS spectroscopy of Charon’s leading and trailing hemispheres. Astrophys J 2001; 121:1163–1170ADSGoogle Scholar
  7. Gerakines P.A., Schutte W.A., Ehrenfreund P. Ultraviolet processing of interstellar ice analogs: I. Pure ices. Astron Astrophys 1996; 312:289–305ADSGoogle Scholar
  8. Hagen W., Allamandola L.J., Greenberg J.M. Interstellar molecule formation in grain mantles: The laboratory analog experiments, results and implications. Astrophys Space Sci 1979; 65215–240CrossRefADSGoogle Scholar
  9. Hollis J.M., Lovas F.J., Jewell P.R. Interstellar glycolaldehyde: The first sugar. Astrophys J 2000;540:L107–L110CrossRefADSGoogle Scholar
  10. d’Hendercourt L.B., Allamandola L.J., Greenberg J.M. Time dependent chemistry in dense molecular clouds: I. Grain Surface Reactions, gas/grain interactions and infrared spectroscopy. Astron Astrophys 1985; 152:130–150ADSGoogle Scholar
  11. Langford V.S., McKinnley A.J., Quickenden T.I. luminescent products in UV-irradiated ice. Acc Chem Res 2000; 33:665–671CrossRefGoogle Scholar
  12. Moore M.H., Hudson R.L., Gerakines P.A. Mid-and far-infrared spectroscopic studies of the influence of temperature, ultraviolet photolysis and ion irradiation on cosmic-type ices. Spectrochim Acta Part A 2001; 57:843–858CrossRefADSGoogle Scholar
  13. Noll K.S., Johnson R.E., Lane A.L., Domingue D.L, Weaver H.A. Detection of ozone on ganymede. Science 1996; 273:341–343ADSCrossRefGoogle Scholar
  14. Seiger M.T., Orlando T.M. Probing low-temperature water ice phases using electron-stimulated desorption. Surface Sci 2000; 451:97–101CrossRefADSGoogle Scholar
  15. Sorrell W.H. Interstellar grains as amino acid factories and the origin of life. Comm Mod Phys 1999; 1E:9–23Google Scholar
  16. Strazulla G., Baratta G.A., Palumbo M.E. Vibrational spectroscopy of ion-irradiated ices. Spectrochim Acta Part A 2001; 57:825–842CrossRefADSGoogle Scholar
  17. Trotman S.M., Quickenden T.I., Sangster D.F. Decay kinetics of the ultraviolet and visible luminescence emitted by electron irradiated crystalline H2O Ice. J Chem Phys 1986; 85:2555–2568CrossRefADSGoogle Scholar

Copyright information

© Kluwer Academic/Plenum Publishers, New York 2005

Authors and Affiliations

  • Anita Dawes
    • 1
  • Nigel J Mason
    • 1
  • Petra Tegeder
    • 1
  • Philip Holtom
    • 1
  1. 1.Dept Physics & AstronomyUniversity College LondonLondonUK

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