Levels of the 4p4 configuration of Ge-like Kr V.

Abstract

The spectrum of four-times-ionized krypton, Kr v, has been observed in the vuv region using a \ensuremath{\theta}-pinch as a light source. The 4s4${\mathit{p}}^{3\mathrm{\ensuremath{-}}}$4${\mathit{p}}^{4}$ transition array has been observed in this ion. This transition has not previously been observed in the Ge i isoelectronic sequence. Thirteen lines were classified that belong to this transition array. All levels of the 4${\mathit{p}}^{4}$ configuration were determined. The identifications are supported by relativistic Hartree-Fock calculations.