Radiative Transition Probabilities of the 1s2p²²P and 1s2p²²D States of the Lithium Isoelectronic Sequence

A Z -expansion procedure is used to obtain eigenvalues and eigenfunctions for the 1 s ² 2 p ² P ^o , 1 s 2 p ^{2 2} P , and 1 s 2 p ^{2 2} D states of the lithium sequence. Expansions in inverse powers of the nuclear charge Z are obtained also for the dipole-matrix elements and oscillator strengths of the 1 s ² 2 p ² P ^o -1 s 2 p ^{2 2} P and 1 s ² 2 p ² P ^o -1 s 2 p ^{2 2} D transitions, valid for Z > 3. A separate calculation was performed for lithium. The calculated transition probabilities agree with the Hartree-Fock values of Gabriel for large Z , but there are considerable discrepancies with the experimental data.