Document Type : Original Article
Authors
1 Faculty of Physics, Semnan University, P.O. Box: 35195-363, Semnan, Iran
2 Nuclear Science and Technology Research Institute (NSTRI),Materials and Nuclear Research School, Tehran, Iran
3 Department of Physics, Faculty of Science, Central Tehran Branch, Islamic Azad University, Tehran, Iran
4 Education of Semnan province, Semnan, Iran
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