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

Energy levels, radiative transition probabilities, and autoionization rates for $2p^63l'nl$ ($n=3-13$) and $2p^64l'nl$ ($n=4-7$), and $2p^53l'3l''nl$ ($n=3-4$) states in Mg-like tungsten are calculated using the COWAN, HULLAC, and RMBPT codes. Autoionizing levels above the thresholds $2p^63l$ and $2p^64l$ are considered. 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 first excited states.Contributions to DR rate coefficients from the excited $2p^63l'nl$ states with $n \ge 14$ and $2p^64l'nl$ states with $n \ge 8$, and additionally from core-excited $2p^53l'3l''nl$ states with $n \ge 5$ are estimated by extrapolation of all atomic parameters. The total DR rate coefficient is derived. These data as well as theoretical satellite spectra are important for L-shell diagnostic of very high-temperature laboratory plasmas such as future ITER plasmas