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Persistent URL http://purl.org/net/epubs/work/40433
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Record Id 40433
Title Importance of non-local electron-positron correlations for positron annihilation characteristics in solids
Abstract Several methods to describe the electron-positron (e-p) correlation effects are used in calculations of positron annihilation characteristics in solids. The weighted density approximation (WDA), giving rise to the non-local, state-selective e-p correlation functions, is applied to calculate positron annihilation rates and e-p momentum densities in a variety of metals and silicon. The WDA results are compared to the results of other methods such as the independent particle model, local density approximation, generalised gradient approximation, and also to experiments. The importance of non-locality and state-dependence of the e-p correlation functions is discussed.
Organisation CCLRC , CSE , CSE-BTG
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Language English (EN)
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Journal Article Mater Sci Forum 363, no. 5 (2001): 564-566. Is in proceedings of: 12. international conference on positron annihilation (ICPA-12), Munich (Germany), 6-12 Aug 2000. 2001