Abstract

The $3d^{10}4s4f–3d^{10}4p4f$ transition array has been identified for Zn-like Kr vii. Spectra produced by an electrical discharge in vacuum were recorded in the vacuum ultraviolet region from 500 to 1400 Å. Twenty one lines have been identified as combinations of levels comprising the above-mentioned transition array. Hence we were able to determine the energy levels of the $4p4f$ configuration. It was also possible to identify eight new transitions from the $4p4d–4p4f$ array. These transitions confirmed the levels of the $4p4f$ configuration. The $4p4d$ ${}^3{P}_0$ and $4s4f$ ${}^1{F}_3$ levels that were missed in the early research with the Kr vii spectrum were also determined. Hartree–Fock calculations with relativistic corrections were used to predict energy levels and transitions.

© 2003 Optical Society of America

3d² Configuration in six-times-ionized argon, Ar vii

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