1. Institute of Experimental Physics, University of Debrecen, Bem tér 18/a, H-4026 Debrecen, Hungary
2. KFKI Institute of Atomic Energy, P.O. Box 49, H-1525 Budapest, Hungary
3. Department of Chemistry, Hallym University, Chun Cheon, Kang WonDo, 200-702, Korea
4. Department of Chemistry, University of Antwerp (UIA), B-2610 Antwerp, Belgium