El-Khayatt, A. M.

Physics Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia Reactor Physics Department, Nuclear Research Center, Atomic Energy Authority, Nasr City, Cairo, Egypt

Al-Rajhi, M. A.

Physics Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia

Hassan, A. T.

Department of Basic Science, October High Institute of Engineering & Technology – OHI, Giza, Egypt

Idriss, Hajo

Department of Physics, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia Sudan Atomic Energy Commission, Khartoum, Sudan