Revised and extended analysis of the Zn-like Kr ion

•Atomic transitions and energy levels for Kr VII were determined.•The experimental data were obtained from a capillary-discharge tube and an optimized theta pinch.•Multiconfiguration Hartree-Fock calculations with relativistic corrections were used.

The spectrum of the six times-ionized krypton (Kr VII) has been observed in the 300-4800 Å wavelength range, resulting in 115 new classified lines. We revised the values for the previously known energy levels and extended the analysis to 38 new energy levels belonging to 4s5s, 4s6s, 4p4f, 4s6d and 4p4d, 4s5p, 4s4f, 4p5s, 4s5f, 4s6p, 4s6f even and odd configurations, respectively. For the prediction of the atomic parameters, energy levels and transition, regularities of atomic structure and relativistic Hartree-Fock calculations were used.