CCSD(T) calculation of the ground-state potential energies for the Hg-rare-gas van der Waals molecules

The spectroscopic parameters (R-e, D-e, omega (e)) for the ground state of the weakly bound Hg-rare-gas (He, Ne, Ar, Kr, Xe) van der Waals molecules have been calculated at the valence coupled-cluster with single and double excitations and perturbative contribution of connected triple excitations level, using quasirelativistic energy-consistent small-core pseudopotentials and large atom-centred basis sets. The theoretical potentials have been obtained without fitting to any experimental data. Very good agreement of the theoretical results with available experimental data has been found.