Relativistic energy, fine structure, and hyperfine structure of the high-lying core-excited statesP5(n)(n=1–7) andSo5(m)(m=1–5) for Be-like boron and carbon

Abstract

The variational method with multiconfiguration interaction wave function is used to obtain the energies of high-lying core-excited states $^{5}P(n)$ ($n=1\char21{}7$) and $^{5}S^{o}(m)$ ($m=1\char21{}5$) in Be-like boron and carbon, including the mass polarization and relativistic corrections. Restricted variational method is carried out to extrapolate a better energy. The oscillator strengths, transition rates, and wavelengths are also calculated. The results are compared with other theoretical and experimental data in the literature. The fine structure and hyperfine structure of core-excited states for this system are also investigated.