1. HUN-REN Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary
2. Institute of Physics and Electrical Engineering, University of Miskolc, 3515 Miskolc, Hungary
3. HUN-REN ATOMKI, Institute for Nuclear Research, P.O. Box 51, H-4001 Debrecen, Hungary
4. Nuclear Physics Institute AV CR, 250 68 Řež near Prague, Czech Republic
5. Departament Química Física i Inorgànica, Universitat Rovira i Virgili, Campus Sescelades, E-43007 Tarragona, Spain