2002/09/10 by H. Sormann, G. Kontrym-Sznajd, R. N. West
Physics and Astronomy · #cond-mat.mtrl-sci
published as Mat. Sci. Forum 363-365, 609-611 (2001)
arxiv created 2002/09/10 · arxiv updated 2009/11/30
Four theoretical approaches to calculate momentum densities of electron-positron annihilation pairs (MDAP) in crystalline solids are confronted with 3D densities reconstructed from two-dimensional angular correlation (2D-ACAR) data for copper, chromium, and yttrium. It is shown that the Bloch-modified ladder theory, in contrast to other approaches, is able to describe - at least qualitatively - the MDAP profiles for all metals investigated.