Energy Levels and Radiative Rates in Al-Like Copper*

Excitation energies from ground state for 98 fine-structure levels and oscillator strengths and radiative decay rates for all electric-dipole-allowed and intercombination transitions among the fine-structure levels of the terms belonging to the (1s$^{2}$2s$^{2}$2p$^{6})$3s$^{2}$3p, 3s3p$^{2}$, 3s$^{2}$3d, 3p$^{3}$, 3s3p3d, 3p$^{2}$3d, 3s3d$^{2}$, 3s$^{2}$4s, 3s$^{2}$4p, 3s$^{2}$4d, 3s$^{2}$4f, and 3s3p4s configurations of Cu XVII, are calculated using extensive CI wave functions [1]. The important relativistic effects in intermediate coupling are incorporated through the Breit-Pauli Hamiltonian. We have also investigated the effects of electron correlations on our calculated data, particularly on the intercombination transitions, by including orbitals with up to n=5, considering up to three electron excitations from the valence electrons of the basic configurations and including a large number of configurations. Our adjusted excitation energies are in excellent agreement with experimental results [2]. We find enormous mixing among several fine-structure levels, making it very difficult to identify them correctly. Our radiative lifetimes of the fine-structure levels agree excellently with those of Ref. [3]. 1. A. Hibbert, Comput. Phys. Commun. \textbf{9}, 141 (1975). 2. T. Shirai \textit{et al}., J. Phys. Chem. Ref. Data \textbf{20}, 12 (1991). 3. E. Trabert \textit{et al}., J. Opt. Soc. Am. B \textbf{5}, 2173 (1988)