V.V Apollonov
General Physics Institute of the USSR Academy of Sciences Moscow Forest Engineering Institute, Moscow, USSR
S.A. Chetkin
Institute of General Physics of the USSR Academy of Sciences, Vavilova 38, Moscow, 117942
V. N. Kharchenko
Moscow State University of Forestry, Russian Federation; Institute of General Physics of the USSR Academy of Sciences, Vavilova 38, Moscow, 117942
V.N. Motorin
Institute of General Physics of the USSR Academy of Sciences, Vavilova 38, Moscow, 117942
A.M. Prokhorov
General Physics Institute of the USSR Academy of Sciences Moscow Forest Engineering Institute, Moscow, USSR