Development of Electron-positron Screened Pseudopotential

Abstract

In the jellium model, for electron-positron annihilation to take place, the positron must overcome the screened potential of the valence electrons. In this paper, we develop electron-positron screened pseudopotential to explain positron annihilation rate in metals. The results obtained show that there is a trend in the variation of the screened pseudopotential for metals in the same group in the periodic table and also that the higher the positron annihilation rate in a metal the higher the screened pseudopotential experienced before annihilation.


Nigeria Journal of Pure and Applied Physics VOLUME 1, AUGUST 2000, pp. 24-27