Photon- and electron-stimulated desorption from laboratory models of interstellar ice grains

J. D. Thrower, A. G. M. Abdulgalil, M. P. Collings, M. R. S. McCoustra, D. J. Burke, W. A. Brown, A. Dawes, P. J. Holtom, P. Kendall, N. J. Mason, F. Jamme, H. J. Fraser, F. J. M. Rutten

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


The nonthermal desorption of water from ice films induced by photon and low energy electron irradiation has been studied under conditions mimicking those found in dense interstellar clouds. Water desorption following photon irradiation at 250 nm relies on the presence of an absorbing species within the H2O ice, in this case benzene. Desorption cross sections are obtained and used to derive first order rate coefficients for the desorption processes. Kinetic modeling has been used to compare the efficiencies of these desorption mechanisms with others known to be in operation in dense clouds. (C) 2010 American Vacuum Society. [DOI: 10.1116/1.3336466]

Original languageEnglish
Pages (from-to)799-806
Number of pages8
JournalJournal of Vacuum Science and Technology A
Issue number4
Publication statusPublished - 2010


  • temperature-programmed desorption
  • amorphous solid water
  • molecular-hydrogen
  • thermal-desorption
  • graphite surface
  • radiation-field
  • dense clouds
  • dust
  • photodesorption
  • emission
  • electron stimulated desorption
  • ice
  • interstellar matter
  • photon stimulated desorption
  • benzene
  • sapphire
  • amorphous silica

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