Project range and range distribution moments up to third order for twelve ion species implanted into five different substrates (such as amorphous A12O3, SiO2, UO2, LiNbO3 and 20/25/Nb stainless steel) are calculated using an improved nuclear scattering function developed recently. Some results are given for the ions considered with energy range from 5 keV to 1 MeV. The present theoretical results ...
The effect of heat treatment on the microstructure and superconducting properties of the alloy Al-8.3 at% Si-8.5 at% Ge prepared by the splat quenching technique has been studied. The results of structure analyses indicate that the rapidly cooled alloy consists of two phases: a supersaturated α-Al (Si, Ge) solid solution (matrix) and amorphous Al-Si-Ge spheres, these spheres connect with each othe...
A simple qnantitative method for X-ray energy dispersive analysis in investigating barium-rare earth fluorocarbonate minerals has been proposed. The reliability of this method has been tested. It is pointed out that the method might be useful in discovering new members belonging to this series of minerals.
Using the X-ray diffraction method, we have investigated the effects of high pressure and H+ impregnation on β→α transition in β-LiIO3 crystals. The samples had been subjected to high pressure treatment (up to 80kb)at room temperature and then preserved in ordinary environmental condition for different periods of time. The experimental results show that in β→α transition in the samples treated as ...
With pulling direction along [0001] axis and normal of (1014) plane, respectively, growth of large LiNbO3 single crystals was achieved by using Czochraski technique. The dimension of the crystals was 100 mm in diameter and 50 mm long. Measurements of various properties were made. The quality of these crystals was found to be uniform. Thieir piezo-elastic-dielectric properties were the same as ordi...
Our investigation indicates that if the incident laser contains distinct pre-pulse, the occurrence of stimulated Brillouin scattering under the interaction of high intensity sub-ns pulse laser with plasmas can be self-consistently confirmed. The evidences include an anomalous increase of the fraction of incident laser energy which is backscattered into the focusing lens, the red shift and broadeni...
In this paper, the sound field of a more general directional radiator in a stratified medium is treated, and the concept of directivity is applied to calculation of the normal modes. The result shows that the normal-mode field of a directional radiator can be obtained by supplementing the normal-mode expression of a omnidirectional point source with the directivity-excitation-function, which is de...
With dark capacitance transient method, electron emission and capture transient processes at deep level, which is located within an energy range of KT above EF in depteled region of zero-biased junction, have been observed in Pt diffused deep diffsion junction of n-Si and p-Si with different background doping density. These transient behaviors agree with the solution of electron variation rate equ...
The toroidal equilibrium properties of relativistic electron beams with double- δ function distribution are considered. The approximate solutions of the magnetic flux and the electric potential equations expanded in terms of the inverse aspect ratio of the torus are obtained analytically. The drift surfaces of electrons in the beam are also described.
The main statements of paper [1] are critically reviewed and the blunders in the deduction are indicated. It is showend that the total energy-momentum complex proposed in paper [1] and the energy of gravitational field in a finite part of space are not unique under pure spatial transformation and, therefore, are not possessed of a definite physical meaning.
A technique is proposed for determining the dispersion and measureing the thickness of epitaxial garnet films. Use is made fully of the transmission spectrum obtained by spe-ctrophotometer. When the wave length is greater than 2μm so that the absorption and dispersion become negligible, the refractive index at the corresponding wave length may be calculated from the extrema of the transmittance. A...
A structural phase transition in crystal LiKSO4 at Tc = 195 K was confirmed by NMR experiment previously. In this article, the temperature dependence of the electric field gradient tensor at lithium site in the range of 110-300 K is reported, and combined with a simplified ion crystal model the crystal structure is discussed. It is shown that even in the room temperature phase, the lithium positio...
Free decay curves of slightly cold-worked Al-0.5 wt% Cu specimen aged at room temperature (20℃) for 24 hrs were determined by an automatic inverted torsion pendulum with computer control. A series of amplitude internal friction peaks were observed as the excitation amplitude was increased succestively even when the internal friction was very low.
This paper gives the relationship between the superconductive critical temperature and the composition of the alloys in Ti-Pd system, and discusses it in connection with the Ti-Pd phase diagram. It is pointed out that the superconductivity in the Ti-Pd system is due to the contribution of the titanium-palladium solid solution. It is also suggested that the limit of the palladium solubility in Ti-P...
The "spillover" of the Raman spectral lines and the change of their intensities were observed in a- LiIO3 single crystal under the action of a DC field. They are due to the fluctuation of the polarizability tensor and the Raman tensor of α-LiIO3 single crystal during the transportation of ions. The former induces the o←→e scattering. Sequently, if this o←→e scattering light acts as an incident bea...
The measurment on the 3/2ω0. harmonic emission from laser plasma has been carried out. The experimental results show that harmonic spectra has a blue-shift of about 70? and is broadened by about 26? when power density on the target surface is about 1014W/cm2. There is a slight broadening of spectra following the increase of power density on the target surface.
Technique on measuring discharge current of Blumlein circuit using magnet-light method is described briefly in this paper. The more exact method estimating distributive inductance of discharge circuit is presented. The circuit equations are solved and the analytic expression of distributive inductance is derived. Finally, the calculated result is discussed.
This compound is a QINGHAOSU degradation product. The molecule consists of 14 carbon, 20 hydrogen, and 3 oxygen atoms. It crystallizes in the orthorhombic system with space group P21 21 21. There are four molecules in a unit cell, the lattice parameters are a = 16.997?, b = 10.298?, and c = 7.394?.The three-dimensional intensity data were collected by using PW-1100 four-circle diff-ractometer and ...