1. Faculty of Physics, Yerevan State University, Yerevan, Armenia
2. Candle Synchrotron Research Institute, Yerevan, Armenia
3. A. Alikhanyan National Laboratory (Yerevan Physics Institute), Yerevan, Armenia
4. Norwegian Radiation and Nuclear Safety Authority, Tromsø, Norway
5. Department of Biology, McMaster University, Hamilton, Canada
6. Joint Institute for Nuclear Research, Dubna, Russia