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

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films

DOI:https://doi.org/10.1116/1.3336466· OSTI ID:22053737

Thrower, J D; Abdulgalil, A G. M.; Collings, M P; McCoustra, M R. S.; Burke, D J; Brown, W A; Dawes, A; Holtom, P J; Kendall, P; Mason, N J; Jamme, F; Fraser, H J; Rutten, F J. M. ^[1]

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1. School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton, Edinburgh EH 14 4AS (United Kingdom)

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 H{sub 2}O 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.

• OSTI ID: 22053737
• Journal Information: Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films, Vol. 28, Issue 4; Other Information: (c) 2010 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1553-1813
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BENZENE
CROSS SECTIONS
DESORPTION
EFFICIENCY
ELECTRONS
INTERSTELLAR GRAINS
IRRADIATION
PHOTONS
THIN FILMS
WATER