Abstract

In calculating the elastic scattering of slow electrons by heavy atoms like mercury, there are the complicating effects of relativity, electron exchange, virtual transitions and correlations, and the first two have already been considered in detail by other workers. In this paper the effect of virtual transitions alone is considered, to see whether the use of either a polarization potential or the channel coupling method provides a satisfactory treatment. It appears that these methods overestimate the effects at low energies and that more sophisticated methods, which are available but which require very lengthy calculations, are necessary to improve the existing calculations for mercury.

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