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 +15.4 +/- 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.
Cencek
Wojciech
W
Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA.
Komasa
Jacek
J
Pachucki
Krzysztof
K
Szalewicz
Krzysztof
K