A new method is suggested to determine the event horizon and the Howking temperature of a spherically charged evaporating black hole. The Klein-Gordon equation near the event horizon is solved.
Based on the independent-particle-approximation (i.e. the multiple scattering self-consistent-field theory), we studied the electronic structures of Rydberg series of the diatomic molecules with Si as their united atom, such as N2, CO, BF, A1H, LiNa, "BeNe" and "MgHe". The principal quantum number of the first state of the Rydberg series is determined from the limit atom of the molecular elecronic...
This paper reconsiders the calculation methods of transition probability its quantum mechanics, and points out that under the action of non-monochromatic light with frequency width Aw, the ionization probability of atoms will seriously deviate from Fermi's Second Golden Rule within the initial interaction period △t≈1/△ω.
A linear-transmission-type apparatus for measuring total cross sections of electron scattering by atoms and molecules has been set up. Measurements on N2 have been carried out for 250-1400eV electrons with an accuracy of 3.5%. The results have been compared with available experimental and theoretical values of the total cross section.
This papers presents the effects of Co-60 gamma irradiation on the absorption loss of single mode optical fibers doped with rare earth Er3+. The parameters of optical fibers are measured, prior to irradiation and after irradiation and UV bleaching. It has been found that absorption loss in the wavelength range of 0.80-1.60μm is greatly lager than those of unirra-diated fibers. Its increase law of ...
PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES
A novel group of experiments has shown that single 10-micrometer-radius-scale laser spot is not able to produce the 90° side emitted three half harmonic efficiently in a preformed laser plasmas. However, with the help of one or two accessary laser spots with size similar to the main one, the side emitted three halfs can easily be built up when some position and angle conditions for the accessary s...
In this paper, the reduced form (four differential equations of the first order) of generalized MHD equations is obtained, only some approximations satisfied by the experimental condition of heating tokamak plasma are used. An analytical dispersion relation (eigenmode solution) for a homogeneous plasma cylinder is obtained. It is shown that Appert's theory is a limiting case of our theory.
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES
A physical model of conducting islands is proposed to explaine the characterizations of dielectric loss of conducting polymers caused by interface polarizability. According to this model, the behavior of the electric loss of conducting polymers caused by conducting islands depends on the dielectric constant and the conductivity of conducting islands itself, as well as its volume fraction occupied ...
The characteristics of amorphization process during mechanical alloying of the mixture of Ni and Zr powders have been studied by differential scanning calorimetry (DSC) and X-ray diffraction measurements. The role of internal stress in the amorphization process, together with the variation in internal stress are discussed.
Electronic structure of atom cluster Fe4B, taken as a tetrahedron, is calcu lated by using the self-consistent field Xα-scattered-wave method. The energy levels, contour maps and densities of states for the atom clusters Fe4 and Fe4B are analyzed and compared respectively, the effect of the B atoms on the electronic structure of atom cluster Fe4B is discussed, and some physical nature of amorphous...
A new compound Sr2CaMoO6 has been synthesized by solid stare sintering. The phase transition of this compound was investigated by means of DTA, X-ray powder diffraction, precise measurement of lattice parameters and other methods. It is discovered that the compound has a displacive phase transition of the first order at (767±5)℃. The low temperaiure phase, or Sr2CaMoO6, belongs to orthorhombic sys...
With Sullivan model as a start point, analysis study for the nature of wetting transition in binary system at three phase coexistence, the typical binary mixture, is conducted by means of trajectory expansion in dynamics approach, from which we modify and make supplements for our previous results.
The wetting transition at four phases coexistence state, a special case of binary Sullivan systems, is studied. Much of its properties can be driven out by the study of two phases coexistence state of the binary system, and the wetting transition of the first order, as well as that of the second order are present.
Using the multiple scattering cluster method (MSC), we have calculated the oxygen K-edge NEXAFS spectra of formate molecule which is the intermediate in the catalytic decomposition of formic acid over Cu(110) surface. The calculation shows that the formate is adsorbed at the short-bridge site of Cu(110) surface, the bond-lengths LC-0 and LCu-o are 1.26±0.01? and 1.975±0.02? respectively, the O-C-O...
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES
The specific heat coefficient and magnetization of the heavy electron metals in a nonzero magnetic field are calculated by using the slave boson mean field theory. The results indicate that the heavy fermion feature of the system is depressed in the magnetic field. A theoretical explanation for anomalous volume magnetostriction of the heavy electron metals is also given in this paper.
Defects charactistics of low-dose p+ implanted silicon after rapid thermal annealing (RTA) was studied. RTA at 600℃ can activate most implanted ions. The defects in samples after RTA below 800℃ are found mainly the ion-implantation induced damage defects. Dislocations are found in samples after RTA above 800℃. The ion-implantation damage defects and thermal stress during quenching step are respons...
Electronic states of Si(100)2×1 clean surface and Si(100)1×1-2H surface are studied with total current spectrometer. The occupied surface states are at 0.25, 8.4 and near 12 eV below thevalence band maximum, while the unoccupied surface states are at 0.7 eV above the valence band maximum. Two induced surface states of Si(100)1×1-2H are observed below the valence band maximum.
In this paper, more than sixty high-Tc oxide superconductors are analysed again with Vil-lars coordinates. Moreover, we introduce two new coordinates, namely, the average electrone-gativity and chemical combination valence. It is found that the high-Tc oxide superconductors are distributed more concentratively in the diagram of these new coordinates.
The magnetization curves, the Curie temperature and the thermal dependence of the coercive force in the pseudobinary cubic Laves phase compounds Tb1-xGdxFe2(0≤x≤l) has been measured. The saturation magnetization decreases almost linearly from TbFe2 to GdFe2. The magnetic moment of the iron atoms is a constant(μFe -1.60±0.04μB) for the whole concentration range, while the moment of terbium atoms is...
With the theory of one-dimensional approximation, combined with the boundary conditions, an inhomogeneous electric field is derived from the foundamental equations of pieozoelec-tric effect. This inhomogeneous electric field will lead to generation of "electric grating", and "high-order grating" can also appear owing to coupling between "electric grating" and "acoustic grating". Linear electro-opt...
Photo-induced absorption states in quasi-one-dimensional halogen-bridged mixed valence platinum complex is investigated. Based on the experimental data, a mechanism for photo-induced absorption is presented. Photo-induced absorption spectra both deformations of alternative and polaron induced for halogen ions are calculated. The comparison with experiments is made.
The dependence of SERS intensity ISERS on the concentration c is studied experimentally for salicylic acid (SA) aqueous solution-Ag mirror system by measuring ISERS And the relation between ISERS and quantity of adsorbed molecules is also discussed. All the results suggest that the SERS technique indeed provides a efficient and high sensitive new method for studying adsorption isotherm property in...
The band-gap narrowing of p-type GaAs as a function of doping concentrafion has been investigated by photoluminescence spectroscopy on samples grown by molecular beam epitaxy on (110) semi-insulating GaAs. It was first found that the band-gap narrowing of p-type GaAs comes from the moving up of valence band, the location of dopant level (band) remains unchanged relative to conduction band, and the...
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY
Auger electron spectroscopy (AES), X-ray photoelectron spectroscop (XPS) and ultraviolet photoelectron spectroscopy (UPS) have been used to study the InSb(lll) surfaces treated with (NH4)O2Sx. It is found that after the sulfide treatment, the sample surfaces are covered by a thin overlayer of sulfide (8?), which prevents the sample surface from oxidization and carbon contamination in the air. XPS ...