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Title: The sticking of atomic hydrogen on amorphous water ice

Using classical molecular dynamics, we have simulated the sticking and scattering process of a hydrogen atom on an amorphous ice film to predict the sticking probability of hydrogen on ice surfaces. A wide range of initial kinetic energies of the incident hydrogen atom (10 K-600 K) and two different ice temperatures (10 K and 70 K) were used to investigate this fundamental process in interstellar chemistry. We report here the sticking probability of atomic hydrogen as a function of incident kinetic energy, gas temperature, and substrate temperature, which can be used in astrophysical models. The current results are compared to previous theoretical and experimental studies that have reported a wide range in the sticking coefficient.
Authors:
; ; ;  [1]
  1. Department of Physics and Astronomy, and the Center for Simulational Physics, The University Georgia, Athens, GA 30602 (United States)
Publication Date:
OSTI Identifier:
22365633
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 790; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; ASTROPHYSICS; DUSTS; FILMS; HYDROGEN; ICE; KINETIC ENERGY; MOLECULAR DYNAMICS METHOD; PROBABILITY; SCATTERING; SIMULATION; SUBSTRATES; SURFACES; WATER