Mixed configuration-interaction and many-body perturbation theory   calculations of energies and oscillator strengths of J=1 odd states of neon
  Ab-initio theory is developed for energies of J=1 particle-hole states of neutral neon and for oscillator strengths of transitions from such states to the J=0 ground state. Hole energies of low-Z neonlike ions are evaluated. 
I. M. Savukov, W. R. Johnson, and H. G. Berry