High-accuracy relativistic many-body calculations of van der Waals coefficients C6 for alkaline-earth-metal atoms -: art. no. 020701

Relativistic many-body calculations of van der Waals coefficients C-6 for dimers correlating to two ground-state alkaline-earth-metal atoms at large internuclear separations are reported. The following values and uncertainties were determined: C-6=214(3) for Be, 627(12) for Mg, 2221(15) for Ca, 3170(196) for Sr, and 5160(74) for Ba in atomic units.