Institution: | (1) Institut für Kernphysik der Universität zu Köln, Köln, Germany;(2) Institute for Nuclear Research and Nuclear Energy Sofia, Sofia, Bulgaria;(3) W.N.S.L., Yale University, CT 06520 New Haven, USA;(4) Dipartimento di Fisica dell Universitá and INFN Sezione Padova, Padova, Italy;(5) INFN, Laboratori Nazionali di Legnaro, Legnaro, Italy;(6) Physik-Department E12, TU München, Garching, Germany |