1. Slovak University of Technology in Bratislava, Faculty of Electrical Engineering and Information Technology, Institute of Nuclear and Physical Engineering, Ilkovičova 3, 812 19 Bratislava, Slovakia
2. Department of Physics, Bu-Ali Sina University, 65174-4161, Hamedan, Iran
3. Department of Nuclear Reactors, Czech Technical University in Prague, V Holešovičkách 2, 180 00 Prague, Czech Republic
4. Department of Mechanics and Materials Science, Wrocław University of Science and Technology, M. Smoluchowskiego 25, 50-370 Wrocław, Poland