Effect of Surface Impurities on the Thermal Accommodation Coefficient
- 15 December 1965
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 43 (12) , 4500-4505
- https://doi.org/10.1063/1.1696723
Abstract
The effect of surface impurities on the thermal accommodation coefficient, which is a measure of the energy exchange between a beam of gas atoms and a solid, is studied with a one‐dimensional model. Quantum theory is used to obtain an expression for this coefficient as a function of temperature, mass of the lattice atoms, mass of the impurity atom, force constant associated with the coupling of the lattice atoms to each other, and force constant associated with the coupling of the impurity to the lattice. The conditions under which a localized mode, due to the presence of the impurity, can contribute strongly to the energy exchange are examined. Results are considered in connection with the accommodation coefficient of helium on metals with surface impurities.Keywords
This publication has 5 references indexed in Scilit:
- Trapping and Energy Transfer in Atomic Collisions with a Crystal Surface. II. ImpuritiesThe Journal of Chemical Physics, 1963
- The dynamics of simple cubic lattices—IIJournal of Physics and Chemistry of Solids, 1962
- Energy exchange between inert gas atoms and a solid surfaceProceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1932
- A quantum mechanical theory of energy exchanges between inert gas atoms and a solid surfaceMathematical Proceedings of the Cambridge Philosophical Society, 1932
- Radiometerdruck und AkkommodationskoeffizientAnnalen der Physik, 1930