Laith A. Najam

Department of Physical, College of Science, University of Mosul, Mosul, IRAQ

Fouad A. Majeed

Department of Physics, College of Education for Pure Sciences, University of Babylon, Hilla, IRAQ

Malik H. Kheder

Department of Physics, College of Education, Hamdania Univ., Mosul, IRAQ

Shaher A. Younis

Department of Physical, College of Science, University of Mosul, Mosul, IRAQ