Affiliation: | 1. Physics Department, Al-Azhar University, Assiut Branch, Assiut, Egypt 2. Physics Department, King Khalid University, Abha, Saudia Arabia 3. Sciences Department, New-Valley Faculty of Education, Assiut University, El-Kharga, Egypt 4. Physics Department, Assiut University, Assiut, Egypt 5. Physics Department, South-Valley University, Aswan, Egypt
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