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Abstracts
Several approximations for the electron-positron interaction are applied to study the electron-positron momentum densities of paramagnetic chromium. The non-local and state selective electron-positron correlation functions, evaluated within the weighted density approximation, are used to calculate various positron annihilation characteristics in this system. The weighted density approximation results are compared to the experimental data, and to the corresponding results of the independent particle model, local density approximation, and generalised gradient approximation. Also, the semi-empirical results are used in gaining more physical insight and deriving final conclusions of this work.
Discipline
- 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)
- 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
- 71.10.-w: Theories and models of many-electron systems
Journal
Year
Volume
Issue
Pages
473-477
Physical description
Dates
published
2001-03/04
received
2000-09-18
Contributors
author
- W. Trzebiatowski Institute of Low Temperatures and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław 2, Poland
author
- Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, Cheshire, UK
author
- Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, Cheshire, UK
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv99n324kz