Relativistic Multireference Møller–Plesset Perturbation Theory Calculations on the Term Energy and Lifetime of the 5S2o State in Siliconlike Ions with Z = 28–79

We employ a recently developed relativistic multireference M?ller?Plesset perturbation theory to calculate accurately the energies of lowest even-parity 3s23p2 3P0,1,2 and 3s23p2 1D2, and odd-parity 3s3p3 5S2o states of ions in the silicon isoelectronic sequence. The 3s3p3 5S2o?3s23p2 3P1,2 and 3s3p3 5S2o?3s23p2 ?1D2 electric dipole transition probabilities and lifetime of the 5S2o state are also computed and compared with experiment.

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