1. Bangladesh Atomic Energy Regulatory Authority (BAERA), E-12/A, Agargaon, Dhaka 1207, Bangladesh
2. Department of Physics, University of Rajshahi, Rajshahi 6205, Bangladesh
3. Department of Physics, Rajshahi University of Engineering & Technology, Rajshahi 6204, Bangladesh
4. Materials Science Division, Atomic Energy Center, Dhaka 1000, Bangladesh