ملخص: We have studied the behavior of electrons and positrons inside a Si crystal by calculating their energies levels and densities of states at different points of the reciprocal space. By establishing a common energy reference between the positron and electron energy bands, we obtain a value of the positron work function which is in good agreement with the experimental result. The value of the positronium work function is also predicted. In these calculations we have used the empirical pseudopotential method coupled with the independent particle approximation.

لغة: إنجليزية