[en] Some of the improved theoretical descriptions of the time evolution of polarization functions for a static muon are given. Muons and several neighbouring nuclei with spins in transverse, zero and longitudinal magnetic fields are considered. Muonium states in transverse fields are also analyzed. Muonium relaxation rates in high transverse fields also yield information about the superhyperfine and dipole interactions

[en] The work is aimed at calculating the potential muon energy V(r) in the non-axially deformed nucleus field, necessary for determining the energy of muon levels in the muonic atom. Accounting for nucleus nonaxiality effects in heavy muonic atoms effects sufficiently the position of muon energy levels shifting some of them by dozens of keV and changing sometimes their sequence. The calculation method applied allows one to take account of nucleus deformation parameters of a higher order than β₂ (e.g. hexadecapole deformation β₄ parameter) if necessary when calculating V(r)

[en] A microscopic model of ionization and Coulomb capture inelastic process in collisions of slow particles M^-(μ^-, π^- etc.) with hydrogen molecules is developed for the first time. Muon slowing-down time (t_s) is calculated from the initial energy E₀=2 keV up to the final energy for the hydrogen at 0.25 Torr pressure. The obtained value of t_s=780 ns is in a satisfactory agreement with experimental (670 ns) one obtained by other authors under the same conditions

[en] The principal idea and some features of a quantitative chemical analysis with muonic X-ray are considered. A series of runs on archeological objects (acient glass samples) is performed using muonic X-ray spectroscopy. The Roman glasses are shown to be not very different from the Celtic ones. Two classes of acient glasses show little K content and a large amount of Na

[en] Experimental data on minimum physics, obtained in the period between the first (1977) symposium and the present one in Dubna in the LIYF synchrocyclotron muon channel by the joint LIYaF (Gatchina) and ITEP (Moscow)-BSU (Minsk) group are systematized. Time picture of μ⁺ interaction in the solid body crystal lattice is given in the modern concept of the author. As a result of systematic investigation into Mu and anomalous muonium Mu* behaviour in silicon monocrystals of n- and p-type of conductivity in Ge and diamond monocrystals in a wide temperature range using perpendicular and longitudinal magnetic field methods, Mu and Mu* state parts are ascertained. State interaction dynamics is studied, temperature regions at which transitions between states occur are ascertained. Molecular radical model verification concerning Mu and Mu* state mobility in GaAs, ZnSe is performed

[en] One of the aspects of applying Mu and Ps, namely, studying their interaction with impurity atoms in a chemically inert matrix of a solid body is considered. The final goal is to determine the microimpurity content in technologically important materials. This problem is especially pressing for anlytical chemistry of hyperpure matters. The applied methods of element-by-element determination of microimpurity content are labour consuming and often do not meet requirements of approximate nonselective analysis by ''pure-impure'' criterion at the level of total impurity content of 10^-3-10^-5% mass

[en] To detect Mu in magnetic semiconductors and dielectrics it is proposed to effect its levels in a resonance way using radiofrequency magnetic fields. It is shown that the method proposed allows one to get information concerning exchange interactions of Mu electron with medium electrons from the measurements of μ⁺ spin precession frequency

[en] The aim is to determine if the hypothesis concerning the formation of μHe⁺(2S)He symmetric complexes corresponds to experimental values of τ_2S(p), τ_2S(p) is the full life time of μHe⁺(2S) mesic ion forming in the pure helium atmosphere within the following pressure: p=7-50 atm). For this purpose a calculation of electron structure and rate of conversion E process of the muon 2S → 1S transition on the electronic shell of possible complexes in the form of a tetrahedron and octahedron with mesic in the symmetry center is conducted. It is shown that E0 and M1 multipoles make contribution to the muon 2S → 1S transition amplitude. In the area of minor Z (Z-the nucleus charge) the dominant contribution to the transition amplitude is made by E0-multipole. Non-relativistic Coulomb wave functions of mesoatomic /1S >- and /2S >- orbits were used in the calculation

[en] Magnetic properties of heavy fermion systems are investigated by μSR. The μSR results show unambiguously the presence of some complicated magnetic order and strong static correlations in CeAl₃ and U₂Zn₁₇ involving severely reduced effective moments below 10^-1xμ_B. Signs of weak magnetism seem to be present in all the heavy fermion systems, studied by μSR. The weak magnetism is a characteristic property which needs to be taken into account into a full theoretical description of these heavy fermion systems

[en] Muon diffusion in metals with fcc lattice is theoretically considered. Muon movement is considered in three-dimensional potential. Metal lattice distortion by muon connected with its movement in the lattice is taken into account. Wave functions in the potential considered are calculated using a computer