All-electron Dirac-Fock-Slater SCF calculations for electronic and geometric structures of the Hg2and Hg3molecules

Abstract
The electronic and geometrical structure of neutral and cationic Hg2 and Hg3 molecules are calculated using the all-electron Dirac-Fock-Slater SCF method, with relativistic numerical atomic basis functions. An improved calculation of the direct Coulomb potential has been taken into account in order to get a numerically accurate potential energy surface. The binding, ionization and excitation energies have been compared with experimental results as well as other theoretical results.