Abstract
Probability distributions of secondary electrons produced by bombarding coated metal surfaces with caesium and lithium ions are reported. The empirical distributions are described mathematically using negative binomial and Poisson distributions and, in one particular case, a positive binomial distribution. Owing to the coating of the surfaces, a systematic dependence of theoretical distributions on physical parameters is not found. It is possible to describe the distribution of the specially normalized relative variances of the emperical probability distributions by means of a gamma distribution. Thus statistical predictions can be made about the parameters and shape of the empirical probability distributions that are expected in the case of electron release from coated surfaces due to bombardment with atomic particles.
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