Calculations of the Transition Energies and Oscillator Strengths for $Cu^{26+}$ Ion

Abstract

Non-relativistic energies of $1s^22s$ and $1s^2np$ $(\leq 9)$ states for $Cu^{26+}$ ion are calculated by using the full-core plus correlation method. For $1s^22s$ and $1s^22p$ states, relative discrepancies between our results and high precision results of Yan et al. are within 0.1 ppm. By taking account of the first-order corrections to the energy from relativistic and mass-polarization effects, the higher-order relativistic contribution and QED correction to the energy are estimated under a hydrogen-like approximation. The transition energies, wavelengths and oscillator strengths for the $1s^22s-1s^2np$ transitions of the ion are calculated. The results obtained by the three forms are in good agreement with each other.