Document Type : Original Article
Authors
1 Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
2 Department of Nuclear Engineering, Seoul National University, Seoul, Korea.
3 Spectroscopy Department, Physics Division, National Research Centre, 33 El Bohouth st. (fromer El Tahrir st.) P.O. 12622 Dokki – Giza – Egypt.
4 Physics Department, Faculty of Science, Al-Azhar Universitrt, Cairo, Egypt
5 Department of Physics Faculty of Science, Islamic University of Madinah, Medina, Saudi Arabia.
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