Calculations of Angular Distributions from Metals using Positron Wave Functions with Proper Crystal Symmetry

Abstract

A positron wave function incorporating the proper crystal symmetry is calculated and applied to the determination of that part of the angular distributions arising from the annihilation of core electrons in Cu, Cd, and Zn. The core electrons are treated in the tight binding approximation while the conduction electrons are assumed to be free. The resulting distributions are found to be in better agreement with experiment than those of previous independent particle calculations.