Abstract
A simple one-dimensional theory of desorption of impurities from solid surfaces is proposed, the initial (adsorbed) state being represented by a one-dimensional semi-infinite lattice model. The properties of the model are analysed in some detail, independently of whether the results are subject to experimental verification. Some of the results, however, have applications to experiment in a qualitative fashion, and the analysis involved may help in the construction of more realistic models. Also, the working forms an illuminating example of Slater's theory of unimolecular reaction rates, our desorbing semi-infinite lattice model being considered as one of Slater's dissociating polyatomic molecules. The paper is restricted mainly to the use of classical mechanics, although some quantum mechanical modifications (concerned with problems linked with the zero-point energy of the solid) are briefly discussed.
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