LOW ENERGY DISSOCIATIVE ELECTRON ATTACHMENT TO OZONE G Senn*, N J Mason=86, J D Skalny=87, A Stamatovic=A7, P Scheier* and T D= M=E4rk * Institut fur Ionenphysik, Leopold Franzens Universitat, Technikerstrasse 25, A-6020, Innsbruck, Austria =86 Molecular Physics Laboratory, Dept. Physics & Astronomy, UCL, Gower Street, London WC1E 6BT, UK =87Department of Plasma Physics, Comenius University, Mlynska dolina, 84215 Bratislava, Slovak Republic =A7 Faculty of Physics, Beograd, P.O.Box 368, 11001, Beograd, Yugoslavia The production of O- and O2- by dissociative electron attachment to ozone is reported for incident electron energies between 0 and 10 eV. A previously unobserved sharp structure is observed in the formation of O- ions at zero incident energy