Abstract

Relativistic theory of few-electron heavy ions is outlined. Ions with increasing number of electrons are studied to show the interplay of many-body and relativistic effects. A complete calculation of two-electron and of the ground configuration of titanium-like ions is reported. The influence of pair creation and correlation on the relativistic M1 transition (1s2s3S1 → 1s2 1 S0) in heliumlike ions is studied. Hyperfine quenching of the J = 4 level of the ground configuration of titanium-like ions is shown to give information on the nuclear electric quadrupole moment.

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