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The author's earlier theory of sputtering has been simplified to a form from which direct computations are possible without extended numerical analysis. A considerable analytic simplification is obtained by a new choice of boundary conditions, and certain mathematical expressions have been modified by physical considerations where a detailed analysis is not justified by the present state of experimental information. The special cases of very high and very low energy sputtering are examined in some detail. The (lnE0)/E0 high-energy results of Goldman and Simon are shown to be fortuitous but still significant. Low energy results are of the form reported by Wehner.
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D. E. Harrison (1960) studied this question.
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