Density-functional approach to one-positron and neutral-atom bound states
- Department of Physics, University of Pune, Pune 411007 (India)
Binding of a positron to a neutral atom is explored within the premise of a three-component density-functional theory. Within this regime, employing model electron-positron correlation potentials (which are crucial for binding), it turns out that the systems {sup 2}[Li;e{sup +}], {sup 2}[Na;e{sup +}], and {sup 2}[K;e{sup +}] exhibit stability with respect to neutral-atom{endash}positron dissociation, but are unstable with respect to positronium-cation dissociation, while the species {sup 3}[He;e{sup +}], {sup 1}[Be;e{sup +}], {sup 2}[F;e{sup +}], {sup 1}[Mg;e{sup +}], {sup 2}[Cl;e{sup +}], and {sup 1}[Ar;e{sup +}] exhibit stability with respect to both these dissociation modes. The indispensability of the inclusion of the electron-positron correlation for atom-positron binding is also emphasized. {copyright} {ital 1996} {ital The American Physical Society}
- OSTI ID:
- 450319
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 55; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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