Extended analysis of the Kr V spectrum

Abstract The spectrum of four-times-ionized krypton (Kr V) has been observed in the 230–4900 A wavelength range, resulting in 91 new classified lines. We were able to identify 21 new energy levels belonging to the 4s 2 4p5d, 4s 2 4p5s, 4s 2 4p6s, 4s 2 4p5p and 4s4p 2 4d configurations. Relativistic Hartree–Fock calculations were used to predict energy levels and transitions.