FINE-STRUCTURE OF EXCITED ATOMIC IONS ALONG POTASSIUM ISOELECTRONIC SEQUENCE

To perform theoretical calculations of electronic structures of high Z atomic ions,one has to consider the configuration mixings due to excitations and rearrangements of the core and valence electron orbitals with the same principal quantum number.We present a method to examine systematically such configuration mixings along isoelectronic sequences.As an illustrative example,such configuration mixings give rise to a reversed fine-structure splitting of 4^(2)F5/2,7/2 states for atomic ions with Z≈36 along the potassium isoelectronic sequence;while the 5F,6F,and 7F have normal fine-structure splittings.