Relativistic configuration interaction calculations of transition energies and hyperfine quenching rates for Ne-like ions

Relativistic configuration interaction (RCI) calculations of Ne-like $2p^5 3s - 2p^6$ transition energies and hyperfine quenching rates have been performed. Large-scale CI expansions exceeding 600,000 configurations are realized with a new, parallel version of our RCI code. Since initial and final states are not in the same complex, we use $2p^5 3s$ potentials for the initial excited state and $2p^6$ potential for the final ground state to generate B-spline basis functions. Relaxation effects on transition energies thus calculated range from $-$0.5371 eV in Na$^{+}$ to $-$0.0077 eV in Xe$^{44+}$. Our results are compared with electron beam ion trap measurements of Ne-like W$^{64+}$ [P.\ Beiersdorfer et al.,\ Phys.\ Rev.\ A {\bf 86}, 012509 (2012)], with NIST database, and with other theoretical predictions.