New Transition and Energy Levels of Three-Times Ionized Krypton (Kr IV)

A capillary pulsed-discharge and a theta-pinch were used to record Kr spectra in the region of 330–4800 A. A set of 168 transitions of these spectra were classified for the first time. We extended the analysis to twenty-five new energy levels belonging to 3s23p24d, 3s23p25d even configurations. We calculated weighted transition probabilities (gA) for all of the experimentally observed lines and lifetimes for new energy levels using a relativistic Hartree–Fock method, including core-polarization effects.