Relativistic correction to the helium dimer interaction energy

The lowest-order relativistic correction to the helium-helium interaction energy has been calculated for the first time, using two independent methods based on expansions in explicitly correlated Gaussian functions. At the equilibrium interatomic distance of 5.6 bohr, this correction amounts to +15....

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Bibliographic Details
Published in:Physical review letters 2005-12, Vol.95 (23), p.233004.1-233004.4, Article 233004
Main Authors: CENCEK, Wojciech, KOMASA, Jacek, PACHUCKI, Krzysztof, SZALEWICZ, Krzysztof
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Atomic properties and interactions with photons
Atomic spectra
Corrections to electronic structure
Electronic structure of atoms, molecules and their ions: theory
Exact sciences and technology
Experimental tests
Physics
Quantum electrodynamics
Relativistic and quantum electrodynamic effects in atoms and molecules
Specific theories and interaction models
particle systematics
The physics of elementary particles and fields
X-ray spectra
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Summary:The lowest-order relativistic correction to the helium-helium interaction energy has been calculated for the first time, using two independent methods based on expansions in explicitly correlated Gaussian functions. At the equilibrium interatomic distance of 5.6 bohr, this correction amounts to +15.4 +/- 0.6 mK. As a by-product, a new upper bound of -10.9985 K for the nonrelativistic Born-Oppenheimer interaction energy has been obtained.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.95.233004