Abstract
It is shown that the Monte-Carlo method can be applied to the study of the diffusion of sputtered particles in a hollow-cathode lamp. It is found that the difference between the `Doppler temperatures' of the spectra of the particles and the carrier gas is due to the high ejection speed of the atoms drawn from the cathode. This ejection speed, as also the concentrations and the speeds of the particles during their diffusion in the cathode region, are calculated.

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