In this article, the wave solutions of multivariate master equation for linear reaction system: A→X have been discussed. Except the density waves which is obtainable from the usual reaction diffusion equation and multiwave solutions, it is not possible to obtain any fluctuation wave branch like that given in ref. [2]. We note that, due to the large difference between the spatial scales of chemical...
The formation of characteristic layered inclusions in the single crystal of potassium acid phthalate (KAP) is discussed in view of the effect of its microscopic structure. That three types of micro structural channels trap the impurities or other different phase precipitates in solution, via a special pair of the conical planes with the highest growth rate and the fluctuation of the growth conditi...
The characteristic of optical bistability is analysed theoretically for the photoelectric modulator with a feedback circuit. The effect of the "critical slowing down" for a step input as it operates in the bistable mode is discussed.
The F-P passive optical oscillator with two feedback circuits is described. This oscillator transforms an input with continous intensity of light into multi-vibrating optical pulses or optical sinusiodal signal output. The principle of oscillation is analysed. The experimental results in agreement with the analysis are presented.
We present here a model of the reduction of dislocations in LPB layers by the formation of oriented interfacial dislocations parallel to the surface of the substrate due to the glide motion of substrate threading dislocations which is drived by the thermal stress produced by a temperature difference. In the temprature gradient LPE under a steady natural convection flow, there is a temperature dif...
Starting from the Vlasov-Maxwell equations by using the method of Self-Consistent field theory, we set up first the coupling relation between distribution function and density of low-frequency oscillating particles and high-frequency EF, low-frequency MF in fourier representation. Then, in the time-space representation, a set of equations for the nonlinear interaction including the effects of magn...
A new mechanism of current driven by a wave is discussed. There is a series of resonant regions in the velocity space of a magnetized plasma interacting with a single wave. When the amplitude of the wave is higher than a threshold, some of the resonant regions will overlap each other and the stochastic effect will appear. If the overlapping region is asymmetric in the longtudinal velocity distribu...
The exciton transition 4T1→6A1 of Mn2+ ions in quasi one-dimensional antiferro-magnet CsMnCl3·2H2O is very weak in intensity with a shorter lifetime due to the vibration-queching. Replacing H2O by D2O), three important effects have been observed: the exciton line is shifted to the red by 18cm-1, the intensity of the exciton is increased by almost one order, the lifetime is lengthened from 0.58 ms ...
The rapidly quenched La80Al20 alloy is amorphous. At atmospheric pressure, its crystallization temperature and glass temperature are ~280℃ and ~242℃ respec-tivily, according to DTA measurements. The superconducting transition temperature Tc increases from 3.87 to 4.18K, in the hydrostatic pressure range of 1-4770 bars, while its residual resistance decreases significantly. After high pressure-high...
This article is a brief summary of our study on poisoning and regenerating at the surface of LaNi5 by impurities, which are H2S, SO2 and CS2 contained in the hydrogen used. The AES, XPS analysises show that the feature of the poisoning for three sulfides are different: LaNi5 poisoned by H2S produces the surface compounds, such as La2S3 and NiS. The chemisorption and physisorption occured due to SO...
By using the irreducible tensor operator method, two corollaries have been derived from generalized Wigner-Eckart theorem and the results associated with the corollaries are obtained. For the. d2 ions in a trigonally distorted cubic crystal field, the effective method dealing with overall problems of D, g‖, g⊥ and absorption spectrum has been suggested on the basis of unified model, in which all p...
In this article, the aberration theory of the combined electromagnetic focussing cathode lenses is described, and the two previous representative papers concerning the aberration theory of cathode lenses, the first contributed by Ximen Jiye (1957) and next by B. B. Bonschtedt (1964), are emphatically analyzed and commented. It is shown that the formulae of aberration coefficients for the cathode l...
We have calculated the project range for ions on amorphous targets made of ternary or quarternary alloys. Our calculations are based upon Vagard's law, which establishes that the project range in multi-component system can be obtained by linear combination of those of its composing binary alloy compounds. The calculated project ranges of systems, H+→GaAlAs, InAs and InGaAs, Be+→ GalnSb and InAsSb,...
The crystal of dimethyl sulphoxide complex of yttrium [Y(NO33·3DMSO] belongs to the monoclinic system, α= 13.604(4)?, b= 12.669(4)?, c= 11.554(2)?, β= 100.14(4)° and Z=4. The space group is P21/n. The diffraction data were collected using PW-1100 four-circle diffractometer. The number of independent diffraction data amounts to 3615. The structure was solved by heavy-atom method. Structure paramete...
Sodium deposition in β-, β"-Al2O3 and Nasicon (Na3Zr2Si2PO12) was studied by using EPMA. Based on the mechanism of ion transportation and electrolytic deposition with a diminished carrier concentration, a kinetic equation for sodium deposition has been derived, which can fit well the time dependence of the sodium counts during electron bombardment. Since an abundant source of mobile Na+ ions exist...
By employing the method of ligand field theory, we calculated the additional potential energies of d electron states of V3X(X = Si, Ga, Ge, Sb, Sn) superconducting compounds, these energies are induced by the D2d) crystal field. We obtained the analytic relation between the. lattice constant and the relative displacement of d sublevels △E⊥, which is the characteristic quantity for the model of d b...
A method for measuring the positron 3γ annihilation, with Ge(Li) detector is introduced, in which the relative yields of 3γ annihilation is measured by the counts of the 511 keV peak only. We call it the "peak method", and compare it with the "peak-valley method."