
Accession Number : AD0664679
Title : CLASSICAL THEORY FOR THE INTERACTION OF GAS ATOMS WITH SOLID SURFACES,
Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE FLUID MECHANICS LAB
Personal Author(s) : Logan,Roderick M. ; Keck,James C.
Report Date : OCT 1967
Pagination or Media Count : 81
Abstract : A classical theory for the interaction of gas atoms with solid surfaces is presented. The principal assumptions of the model used are: (1) The surface atoms involved in the collisions can be represented as independent onedimensional oscillators; (2) the gas atoms interact with the surface through a stationary squarewell attractive potential and an exponential repulsive potential; (3) the surface is flat so that the tangential velocity component of the gas atom is unchanged; (4) the surface oscillators have an equilibrium energy distribution at the temperature of the solid. This model represents a logical successor to the 'hardcube' model introduced by Logan and Stickney (J. Chem. Phys. 44, 195 (1966)) and allows the important effects involving the collision time and the natural frequency of the surface atoms to be taken into account. (Author)
Descriptors : (*MOLECULAR BEAMS, SCATTERING), GASES, SURFACES, INTERACTIONS, THEORY, ATOMS, ONE DIMENSIONAL FLOW, OSCILLATION, FREQUENCY, DISTRIBUTION, XENON, SILVER, RAREFIED GAS DYNAMICS
Subject Categories : Aerodynamics
Fluid Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE