1. Joint Institute for Nuclear Research, Joliot-Curie Str., 6, 1419890 Dubna, Russia
2. Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, 30, Reactorului str., 077125 Buharest, Romania
3. A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova Str., 28, 119991 Moscow, Russia
4. Institute of Physics of Vietnamese Academy of Science and Technology, Hanoi 700000, Vietnam