1. Graduate School of Natural and Applied Sciences, Department of Advanced Technologies, Gazi University, 06500 Ankara, Turkey
2. Turkish Energy, Nuclear and Mineral Research Agency, 06980 Ankara, Turkey
3. Faculty of Science, Department of Physics, Gazi University, 06500 Ankara, Turkey
4. Faculty of Technology, Department of Metallurgical and Materials Engineering, Gazi University, 06500 Ankara, Turkey