Optimized effective potential energies and ionization potentials for the atoms Li to Ra F. J. Gálvez, E. Buendía, P. Maldonado and A. J. Sarsa Eur. Phys. J. D, 50 3 (2008) 229-235 Published online: 28 November 2008 DOI: 10.1140/epjd/e2008-00222-0