Institution: | (1) Institut für Ionenphysik, Leopold Franzens Universität, Technikerstr. 25, A-6020 Innsbruck, Austria;(2) Present address: Dept. Chemistry, Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS, UK;(3) Present address: Dept. Plasmaphysics, Comenius University, Mlynská dolina, 842 15, Bratislava, 4, Slovak Republic;(4) Present address: Faculty of Physics, P.O.Box 638, Yu-11001 Beograd, Yugoslavia |