Dynamics of gas-solid interactions: Calculations of energy transfer and sticking

Mary Shugard*, John C. Tully, Abraham Nitzan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

139 Scopus citations


A classical mechanical generalized Langevin formalism is applied to the study of gas-surface collisions. Procedures are described for constructing generalized friction and fluctuating forces which accurately represent the motion of real solids, and which can be conveniently implemented in a classical stochastic trajectory calculation. Energy transfer computed using this approach for He-W collisions is in excellent agreement with results of a quantum mechanical distorted wave calculation employing the same phonon density of states. The method is further applied to the study of residence times and sticking probabilities. Results indicate that the stochastic trajectory approach is feasible and capable of accurate simulation of gas-surface collision phenomena.

Original languageEnglish
Pages (from-to)2534-2544
Number of pages11
JournalThe Journal of Chemical Physics
Issue number6
StatePublished - 1976


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