Accurate Relativistic Fock-Space Calculations for Many-Electron Atoms

Accurate Relativistic Fock-Space Calculations for Many-Electron Atoms 

School of Chemistry, Tel Aviv University, 69978 Tel Aviv, Israel 

The structure, spectroscopy and chemistry of heavy atoms exhibit large relativistic effects. These effects play an important role in lighter elements too, showing up in phenomena such as fine or hyperfine structure of electronic states. Perturbative approaches, starting from a non-relativistic Hamiltonian, are often adequate for describing the influence of relativity on light atoms for heavier elements, the Schrodinger equation must be supplanted by an appropriate relativistic wave equation. 

The basic relativistic equations are described in Sec. 2, and the Fock-space coupled cluster method is discussed in Sec. 3. The recently developed intermediate Hamiltonian approach is described and illustrated by several 

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