V.V. Borisov - Senior Research Scientist, Federal State Budget Educational Institution of Higher Education M.V. Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics (SINP MSU). Е-mail: borvv1947@mail.ru А.А. Pilevsky - Research Scientist, Federal State Budget Educational Institution of Higher Education M.V. Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics (SINP MSU). Е-mail: k109@dnph.phys.msu.su V.V. Popov - Ph.D. (Phys.-Math.), Senior Research Scientist, M.V. Lomonosov Moscow State University. Е-mail: popov@hgr.ru