Polarisabilities and long-range atom-atom interactions of atoms and ions

Synopsis Effective oscillator strength distributions are systematically generated and tabulated for the alkali atoms, the alkalineearth atoms, the alkaline-earth ions, the rare gases and some miscellaneous atoms. These effective distributions are used to compute dipole, quadrupole, and octupole static polarisabilities. These polarisabilities can be used to determine the long-range C6, C8 and C10 atom-atom interactions for the dimers formed from any of these atoms and ions, and we present example tables of some combinations. A relativistic description of the structure of heavy alkali atoms and alkali-like ions using S-spinors and L-spinors has been developed and results of the dynamic polarisabilities of Sr+ will be presented.