Ionization potentials of atoms and ions from lithium to tin (z=50)

New ionization potentials are derived for many light ions (3 less than or equal to Z less than or equal to 50) by a systematic consideration of the differences between calculated nb initio values of these potentials and the NIST-evaluated database along the Li through Ar isoelectronic sequences. A relativistic multiconfiguration Dirac-Fock approach has been used for calculating the ab initio values of the ionization energies. Analytical expressions are obtained for expressing the differences between the theoretical data and the compiled results available along the different sequences, allowing the assessment of previous results and also reliable predictions of new potential values for many ions. (C) 1999 Academic Press.