We measured DR resonances in Lithium like Kr33+ in the energy range 3-14 eV
. The absolute energy scale was deter-mined within 30 meV and the relative
energy scale (difference between states) to within 10 meV. Our results are
in good agreement with calculations obtained by relativistic many-body pert
urbation theory. The contributions from QED effects in this system are arou
nd 1.5 eV.