Effect of the Positron-Phonon Interaction on Positron Motion

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Abstract
We have made a calculation of the effect of the positron-phonon interaction on positron motion in simple cubic metals. We use a slightly modified jellium model to treat the positron-phonon interaction, and several approximations are introduced. Still, we feel confident that our calculations are qualitatively correct, and we conclude that phonons must play a role in determining positron motion in metals at low temperatures. In this region, phonon excitation provides an important additional mechanism for energy loss although it does not appear to contribute significantly to the effective positron mass.

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