Determination of the electron momentum distribution of matter by the positron-annihilation method

A method is developed for recovering the density function of annihilating electron-positron pairs from the angular correlations of the annihilation gamma rays. On the basis of this positron-annihilation mechanism, the electron density functions of the matter are determined from the time spectra of the positron lifetime and the angular distributions of the annihilation gamma rays.The material of this paper was presented at the Fourth International Conference on the Density of Electrons, Spins, and Moments (Minsk, August, 1973).Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 8, pp. 103–109, August, 1974.