Correlation effects for electron-positron momentum density in solids
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© 1997 American Physical Society (APS). This is the accepted version of the following article: Barbiellini, B. & Hakala, M. & Puska, M. J. & Nieminen, Risto M. & Manuel, A. A. 1997. Correlation effects for electron-positron momentum density in solids. Physical Review B. Volume 56, Issue 12. 7136-7142. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.56.7136, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.56.7136.
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Date
1997
Major/Subject
Mcode
Degree programme
Language
en
Pages
7136-7142
Series
Physical Review B, Volume 56, Issue 12
Abstract
A method describing the calculation of the momentum density of annihilating electron-positron pairs in solids has been developed. One-electron states, which are not perturbed by the positron, are used. The effects due to the enhancement of the electron density near the positron are taken into account by a factor depending on the electron state in the annihilating pair. This enhancement is used both for the valence and core electron states. The calculated momentum densities are in good agreement with the two-dimensional angular correlation of the annihilation radiation measurements in defect-free Cu and GaAs.Description
Keywords
electron-positron pairs, momentum density
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Citation
Barbiellini, B. & Hakala, M. & Puska, M. J. & Nieminen, Risto M. & Manuel, A. A. 1997. Correlation effects for electron-positron momentum density in solids. Physical Review B. Volume 56, Issue 12. 7136-7142. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.56.7136.