Excitation energies, radiative and autoionization rates, dielectronic satellite lines, and dielectronic recombination rates for excited states of Na-like W from Ne-like W

Energy levels, radiative transition probabilities, and autoionization rates for 1s22s22p53l′nl,1s22s2p63l′nl(n=3–7,l⩽n-1) and 1s22s22p54l′nl,1s22s2p64l′nl(n=4–6,l⩽n-1) states in Na-like tungsten (W63+W63+) are calculated. Cowan’s relativistic Hartree–Fock method, the relativistic multiconfiguration method implemented in the Hebrew University Lawrence Livermore Atomic Code, and the relativistic many-body perturbation theory method, are used. Autoionizing levels above the threshold 1s22s22p61s22s22p6 are considered. It is found that configuration mixing [3sns+3pnp+3dnd],[3snp+3pns+3pnd+3dnp] plays an important role for all atomic characteristics. Also strong mixing between states with 2s2s and 2p2p holes (1s22s22p53l1nl2+1s22s2p63l3nl4)(1s22s22p53l1nl2+1s22s2p63l3nl4) occurs. Branching ratios relative to the first threshold and intensity factors are calculated for satellite lines, and dielectronic recombination (DR) rate coefficients are determined for the excited 1s22s22p6nl(n=3–7,l⩽n-1) states. It is shown that the contribution of the highly excited states is very important for calculation of total DR rates. Contributions from the autoionizing states 1s22s22p53l′nl,1s22s2p63l′nl(n⩾8) and 1s22s22p54l′nl,1s22s2p64l′nl(n⩾7) to the DR rate coefficients are estimated by extrapolation of all atomic parameters. The orbital angular momentum (l  ) distribution of the rate coefficients shows a peak at l=2l=2. The total DR rate coefficient is derived as a function of electron temperature. The dielectronic satellite spectra of W63+W63+ are important for L-shell diagnostics of very high-temperature laboratory plasmas such as future ITER fusion plasmas.