In this work, we analyzed the spectral of the (Kr VII), we are interested in studying of the configurations 4p4f, 4s6s and 4s6f. For the 4p4f configuration we revised their energy levels (CAVALCANTI et al.,1980), and for the configurations 4s6s and 4s6f, we conducted a graphic study
using isoelectronic sequence data. The study of these configurations will contribute to de-termination of life time, transition probabilities and the oscillator strengths. There are a demand of these results in astrophysical, nuclear fusion, collision physics and laser physics. We used the Hartree-Fock (HFR) relativistic approximation for the calculated of values energy levels. In this research was used the computer code developed by Professor Robert Cowan (COWAN,1919). To determine the energy levels of the configurations were used the tables with transition lines of the krypton. These tables were obtained from experiments conducted at the University of Lund,
Sweden (TRIGUEIROS et al.,1986), Centro de Investigaciones Opticas - CIOp / Argentina (RAINERI et al.,2000) and Laboratory of Plasma Spectroscopy and Atomic Physics Institute of the UFF (ELEUTE´
RIO et al.,2011).
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