1. Institut für Ionenphysik und Angewandte Physik
2. Universität Innsbruck
3. A-6020 Innsbruck
4. Austria
5. Department of Physics
6. University of Sargodha
7. 40100 Sargodha
8. Pakistan
9. Karaj Branch
10. Islamic Azad University
11. Karaj
12. Iran
13. Department of Nuclear Physics and Biophysics
14. Comenius University
15. SK-84248 Bratislava
16. Slovakia
17. Department of Chemistry
18. York University
19. Toronto
20. Canada