1. Institute of Experimental Physics
2. Faculty of Mathematics
3. Physics and Informatics
4. University of Gdansk
5. 80-308 Gdansk
6. Institute of Physics
7. Faculty of Physics
8. Astronomy and Informatics
9. Nicolaus Copernicus University
10. 87-100 Torun
11. Department of Material Science and Metallurgy
12. Silesian University of Technology
13. 40-019 Katowice
14. Poland