Abstract

The influence of the positron distribution and electron‐positron interactions on the momentum density of annihilation quanta in real metals is discussed. The role of momentum dependence of two‐particle electron‐positron correlations is set forth. The average densities determined by electron‐positron correlations are presented for valence electrons in simple metals. Momentum‐dependent enhancement factors e(p) describe the deviation of momentum density of annihilation quanta from the electron momentum density in the material investigated. The necessity of reconstruction of experimental ACPAR spectra while determining e(p) is substantiated.

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