Electron-Positron Correlations in Paramagnetic Chromium

• Authors: A. Rubaszek , Z. Szotek , W. Temmerman
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

78.70.Bj; 71.10.-w; 71.60.+z

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

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 99
• Issue: 3-4
• Pages: 473-477

Dates

published

2001-03/04

received

2000-09-18

Contributors

author

A. Rubaszek

• W. Trzebiatowski Institute of Low Temperatures and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław 2, Poland

author

Z. Szotek

• Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, Cheshire, UK

author

W. Temmerman

• Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, Cheshire, UK

References

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Identifiers

DOI

10.12693/APhysPolA.99.473