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Angle and speed distributions of hydrogen desorbing thermally from metal surfaces

II. Application to D2 desorbing from a Ni(111) surface

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Abstract

On the basis of the theory developed in a previous paper (Part I), the angle and speed distributions of D2 molecules desorbing thermally from the Ni(111) surface are numerically calculated in the present paper (Part II). The dynamical motion of the activated complex of the recombinative desorption process is calculated by using a model potential surface, which involves a few parameters introduced to describe the necessary features of the potential surface at the transition state. Numerical calculations are carried out, and the results show that the present dynamical theory reproduces very well a variety of the characteristic features of the experimental results, e.g., sharply focused angular distribution, mean translational energy lower than 2k B T at grazing angle, and the non-Maxwellian profile of the TOF distribution.

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Author notes

  1. Y. Ohno

    Present address: Institute for Molecular Science, Myodaiji, 444, Okazaki, Japan

  2. T. Nakamura

    Present address: Hokkaido Institute of Technology, 006, Sapporo, Japan

Authors and Affiliations

  1. Research Institute for Catalysis, Hokkaido University, 060, Sapporo, Japan

    Y. Ohno & T. Nakamura

  2. Department of Chemistry, Faculty of Science, Hokkaido University, 060, Sapporo, Japan

    H. Kita

Authors
  1. Y. Ohno
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  2. T. Nakamura
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  3. H. Kita
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Ohno, Y., Nakamura, T. & Kita, H. Angle and speed distributions of hydrogen desorbing thermally from metal surfaces. Appl. Phys. A 51, 35–47 (1990). https://doi.org/10.1007/BF00324463

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  • DOI: https://doi.org/10.1007/BF00324463

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