The nutation and relaxation signal associated with the hfs 0-0 transition of the Rb87 ground state are calculated and observed. The experimental results are qualitatively in agreement with the calculation.
Using optical method the retrograde velocities of vacuum arcs in magnetic fields were measured as a function of the cathode temperature for Cu, Al and 316 stainless steel used as the cathode material. It was found that with increasing the cathode temperature the arc velocity decreases. The experimentally measured temperature dependence of retrograde velocity of vacuum arcs can be explained by the ...
In a homotropic nematic cell, a solitary-like director wave is excited by a mechanical method. A series of photographs of the wave propagation process are obtained. When white light is used, we noticed the propagation of some dark lines along the cell, and we got the plot of the positions and velocities of the dark lines vs time. According to the results obtained from the interference patterns of ...
On the basis of ref. [1], the time-resolved absorption spectrum of vibrational excited states v3 in BCl3 molecules are observed and investigated in higher laser energy flux. The excitation of vibrational states and a variety of energy transfer processes in relaxation, as well as their dependence on the pumping laser energy, the pressure of BCl3 and other parameters are measured. The result shows t...
The dynamic processes, of energy transfer of the 4T1 exciton of Mn2+ ions have been studied in the temperature region 2-300 K in the pure and Mg2+-, Ni2+-, Co2+-doped quasi-one-dimensional antiferromagnet CsMnCl3·2D2O (CMC). It has been found that the fluorescent intensity and the lifetime of the exciton drops rapidly with increasing temperature in the region 2-10 K, with a further weakened fluore...
As an extension of the method presented in reference [4], this paper concerns with the transformation from Ising spin S=1 systems to a Fermion system in which the total number of particles is not a constant. We obtained rigorously the ground state energy of the antiferromagnetics of Ising S=1 fcc lattice with nearest neighbors and next nearest neighbors interaction in an arbitrary magnetic field, ...
A theoretical treatment was developed to explain the light diffraction bands normal to the c-axis subtending large angle and strong in intensity which were investigated in much details with a -LiIO3 single crystals under the action of a d. c. field. It is assumed only that a fluctuation of the space charge density Sp (x, y) appears as ionic transportation taking place in the c-direction. The relat...
In ref.[1] a theory has been formulated for treating the anisotropic modes (o→e) of diffraction observed in α-LiIO3 single crystals under a d. c. field. In the present article we consider the isotropic modes (o -o, e e) of diffraction observed in similar conditions with the same material. There are two kinds of diffraction bands: (1) those perpendicular to the c-axis and wide in angular extension,...
The hydrogen adsorption on Al(111) and Ag(111) surfaces have been studied by the charge self-consistent EHT method. It is shown that the H2 molecule would dissociated on Al(111) surface, the H atom could be adsorbed at certain sites with symmetric geometry (such as the threefold, eclipsed, bridge and the atop sites), and H could penetrate into the surface layer and become an interstitial atom. How...
The two-dimensional alternative binary system is studied by using the Collins model. The free energy of the system is calculated. The equation of the solubility curve is given. Using the condition of phase equilibrium, the phase diagrams of the two-dimensional alternative binary system are obtained, Finally, a dicussion on the results are presented.
In this work, we investigated the ion range parameters for binary compounds having positive deviation from Bragg rule, that is the calculated Se(E) value is higher than experimental Se(E) value, By introducing a "biatomic model" with the idea of "regular", the implanted range in binary compounds was considered not only as the stopping power of ions by two alike cofposed atoms S11(E) and S22(E), bu...
A phase diagram of the alloys of the Dy-Sn binary system has been investigated by means of X-ray diffraction method and differential thermal analysis. The intermetallic com- pounds DySn2,Dy5Sn3,Dy5Sn4 and Dy11Sn10 were detected, and the new intermetallic Compounds Dy2Sn,DySn,Dy8Sn9,Dy4Sn7 and DySn4 were observed.There are four eutectic reactions and six peritectic reactions in Dy-Sn system. Dy2Sn,...
The hexagonal metastable phase formed in an amophous Ni-P alloy during crystallization exhibits four different orientations. It is shown by SAD that they are four-fold rotation twins around [021]. These four crystals have a common fcc sublattice and their twin relationship may be described by a rotation of 90o about one of the axes of the sublattice.
In this paper, the magnetic behaviour of Fe-Ni invar alloy is analysed on the basis of Mossbauer spectrum. The coexistence of two magnetic states of iron atom is revealed and invar mechanism of Fe-Ni invar alloys is interpreted according to the above view point. The equations with which one can determine experimentally the magnetic moments of the iron atom in two magnetic states are presented. Ano...
The soliton induced by filamentary perturbation is discussed by using the reductive perturbation method. A K-dV equation for the perturbation of beam electrons is derived.
In this paper, we discuss the trimolecular model with a forced oscillation term. We carried out the numerical calculations. Some results are given for the case of forced oscillation amplitude c=0.05 and forced oscillation frequencies D over a certain range. We have found the 2n-point periodic sequences by analyzing these results and cam-pared them with Peigenbaum constant δ .