On the reliability of various enhancement theories for a description of electron-positron densities in metals

Details On the reliability of various enhancement theories for a description of electron-positron densities in metals On the reliability of various enhancement theories for a description of electron-positron densities in metals

2002-09-10

arxiv.org/abs/cond-mat/0209235v1

Mat. Sci. Forum 363-365, 609-611 (2001)

Physics

Condensed Matter

Materials Science

Scientific paper

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.

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