About the Authors

H. A. Saudi

Physics Department, Faculty of Science, Al-Azhar University, Girls Branch, Nasr City, Cairo, Egypt

H. A. Sallam

Physics Department, Faculty of Science, Al-Azhar University, Girls Branch, Nasr City, Cairo, Egypt

K. Abdullah

2Physics Department, Faculty of Science, Al-Azhar University, boys Branch, Nasr City, Cairo, Egypt

Corresponding Author

Email: heba_saudi@yahoo.com