Relativistic corrections to the ground-state energy of the positronium molecule

Journal Article · Fri Jun 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.062504· OSTI ID:20991127

Bubin, Sergiy ^[1]; Stanke, Monika ^[1]; Kedziera, Dariusz ^[2]; Adamowicz, Ludwik ^[1]

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1. Department of Chemistry, University of Arizona, Tucson, Arizona 85721 (United States)
2. Department of Chemistry, Nicholas Copernicus University, ul. Gagarina 7, PL 87-100 Torun (Poland)

The leading-order relativistic corrections to the ground-state energy of the positronium molecule (Ps{sub 2}) have been computed within the framework of perturbation theory. As the zero-order wave function we used a highly accurate nonrelativistic variational expansion in terms of 6000 explicitly correlated Gaussians that yielded the lowest variational upper bound for this system to date. We also report some expectation values representing the properties of Ps{sub 2}.

• OSTI ID: 20991127
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 75; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COMPUTER CALCULATIONS
CORRECTIONS
EXPANSION
GROUND STATES
MOLECULES
PERTURBATION THEORY
POSITRONIUM
RELATIVISTIC RANGE
WAVE FUNCTIONS