A. A. Alkufi
1.University of Babylon, College of education for pure sciences, Department of Physics, Babylon, Iraq 2. Education Directorat e of Najaf, Ministry of Education, Al-Najaf, Iraq
Iraq

A. A. Abojassim
University of Kufa, Faculty of science, Department of Physics, Al-Najaf, Iraq
Iraq

M. H. Oleiwi
University of Babylon, College of education for pure sciences, Department of Physics, Babylon, Iraq
Iraq