EJECTED ELECTRON SPECTRA FROM HIGH ENERGY HIGHLY CHARGED OXYGEN IONS IN COLLISIONS WITH ATOMS S.Kitazawa1, M.Sataka1, H.Tawara2, M.Imai3, H.Shibata4, K.Komaki5, K. Kawatsura6 and Y.Kanai7 1Japan Atomic Energy Research Institute (JAERI), Tokai, Ibaraki 319-1195, Japan 2National Institute for Fusion Science (NIFS), Toki, Gifu 509-5292, Japan 3Department of Nuclear Engineering, Kyoto Univ., Kyoto 606-8501, Japan 4Research Center for Nuclear Sciences and Technology, Univ. Tokyo, Ibaraki 319-1106, Japan 5Institute of Physics, Graduate School of Arts and Sciences, Univ. Tokyo, Meguro, Tokyo 153-8902, Japan 6Depertment of Chemistry and Materials Technology, Kyoto Institute of Technology, Kyoto 606-8585, Japan 7The Institute of Physical and Chemical Research (RIKEN), Saitama 351-0198, Japan Coster-Kronig electrons from autoionising Rydberg states of MeV/u oxygen projectiles excited through atomic gas target were observed at zero degrees. The spectra are compared with those of keV/u experiments.