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Photon- and electron-stimulated desorption from laboratory models of interstellar ice grains.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A.
(pp. 799 - 806).
A V S AMER INST PHYSICS
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]
|Title:||Photon- and electron-stimulated desorption from laboratory models of interstellar ice grains|
|Event:||56th Annual Meeting of the American-Vacuum-Society|
|Location:||San Jose, CA|
|Dates:||2009-11-08 - 2009-11-13|
|Keywords:||TEMPERATURE-PROGRAMMED DESORPTION, AMORPHOUS SOLID WATER, MOLECULAR-HYDROGEN, THERMAL-DESORPTION, GRAPHITE SURFACE, RADIATION-FIELD, DENSE CLOUDS, DUST, PHOTODESORPTION, EMISSION|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry|
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