Positron diffusion in an electric field has been experimentally investigated by implanting positrons in the depleted zone of an Au/Si Schottky diode. The results show that fields with an intensity of about 10 4 V cm -1 have a strong effect on positron diffusion. Before annihilation, thermalised positrons can drift distances of about 2 mu m.
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Corbel et al. (1989) studied this question.
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