I.I. Pasha, M.A. Smirnov, F.A. Tsitsin

N.I. Вalalуkin, V.I. Nazarоv, V.I. Panov

N.R. Nurtdinov, A.V. Vinnikov

V.I. Pavlov, Yu. Slabeycius

V.L. Korotkikh, К.К. Krupnikov

V.A. Nekhaenko

G.P. Dzhotyan, Yu.E. Dyakov

The theory of stimulated Raman scattering in a dispersive medium is extended to the case of arbitrary intensity of multimode pumping. The effect of dispersion on the stimulated Raman scattering increment is investigated. An analytic solution of truncated equations with allowance for boundary conditions is obtained for an arbitrary number of modes.

V.D. Avchukhov, K.A. Baskova, S.S. Vasil'ev, Yu.V. Krivonogov, V.V. Krotova, S.N. Lebedintsev, В.M. Makuni, V.A. Кruschov, Т.V. Chugay, L.Ya. Shavtvalоv

The isomeric ratios in reactions $^{102}$Pd($p,n$)$^{102mg}$Ag, $^{104}$Pd($p,n$)$^{104mg}$Ag, $^{105}$Pd($p,n$)$^{105mg}$Ag are measured. The isomeric ratios for $^{105mg}$Ag were also obtained in reactions $^{103}$Rh ($α,2n$). For $^{105mg}$Ag the isomeric ratios were calculated on the basis of the statistical theory within the framework of the Fermi - gas, independent pairing of particles and superconductor models. For the spin cutoff parameter σ we obtained the values: 3,3±O,4($^{102mg}$Ag); 3,5±0,5($^{104mg}$Ag) и 4,0±0,5($^{105mg}$Ag). For $^{105mg}$Ag we obtained best agreement between the analytic and experimental values of isomeric ratios in the independent particle pairing model at density parametera $α =(А/8)$ MeV$^{-1}$, and in the superconductor model at $α =(А/6)$ МэВ$^{-1}$. The energy of excitation dependence of isomeric ratios confirms the value of spin (equal to two) for isomers $^{102mg}$Ag and $^{104mg}$Ag, previously established from decay models.

N.A. Mikhауlоva, G.S. Fomenko

The distribution of the rms deviations of vertical velocity compoents of flow and solids at different solid densities over the flow depth is examined. The intensity of fluctuations of vertical components of particle velocities decreases with increasing solids concentration.

V.I. Maksimochkin, K.A. Valeev

The paper describes a device making it possible to i n vestigate irreversible magnetic properties of rocks and minerals in variable magnetic fields up to 600 oersted over a frequency range from 50 Hz to 20 kHz. The residual magnetization is measured by a three-magnet astatic magnetometer with electronic feedback, which makes it possible to automate the measurements and to use a digital recorder. The magnetometer systems makes it possible to monitor the asymmetry of a variable magnetic field and the magnetization of a specimen by this field. Investigations performed with this device showed that the magnitude and stability of the partial ideal residual magnetization of rock specimens depends in a certain manner on the frequency. These effects are attributed to relaxation, induced by the diffusion magnetic aftereffect. The fact that the stability of the ideal residual magnetization is a function of both the temperature and frequency confirms the above causality.