1. Institute of Physics University of Silesia 75 Pułku Piechoty 1 41-500 Chorzów Poland
2. Faculty of Chemistry University of Wrocław F. Joliot-Curie 14 50-383 Wrocław Poland
3. Faculty of Physics Technische Universität Kaiserslautern Erwin Schrödinger Str. 46 67663 Kaiserlautern Germany