Abstract
A new approach to the analysis of positron annihilation long slit angular distributions is presented. The analysis, which provides a more direct measure of the Fermi surface profile, is applied to data for Cu and the results are found to agree well with the computed surfaces of Roaf and Halse. The same analysis provides a guide to the form and intensity of that part of the angular distribution arising from the annihilation of electrons occupying states in the filled Brillouin zones.