| Authors: |
Fouad SS; Department of Physics, Ain Shams University Cairo 11566 Egypt., Soliman LI; Department of Solid-State Physics, National Research Center Cairo Egypt., Baradács E; Department of Environmental Physics, University of Debrecen, Poroszlay u.6 Debrecen-4026 Hungary zoltan.erdelyi@science.unideb.hu.; Departement of Solid-state Physics, University of Debrecen P. O. Box 400 Debrecen-4002 Hungary., Osman NF; Basic Science Department, Modern Academy for Engineering and Technology in Maadi Cairo Egypt., Nabil M; Department of Basic Engineering Sciences, Faculty of Engineering (Shoubra) Benha University Benha Egypt., Sayed ME; Basic Science Department, Modern Academy for Engineering and Technology in Maadi Cairo Egypt., Tomán JJ; Departement of Solid-state Physics, University of Debrecen P. O. Box 400 Debrecen-4002 Hungary., Mehta N; Physics Department, Banaras Hindu University Varanasi-221005 India dr_neeraj_mehta@yahoo.co.in., Erdélyi Z; Departement of Solid-state Physics, University of Debrecen P. O. Box 400 Debrecen-4002 Hungary. |
