bluuebunny/crossref_metadata_2025 huggingface dataset:
ON THE GOLDSTONE MODE IN THE STATIONARY STATE OF A NON-EQUILIBRIUM DISSIPATIVE SYSTEM
Authors: ZHOU GUANG-ZHAO  , SU ZHAO-BING  ,   中国科学院理论物理研究所
Published: November 2020

In consequence of the spontaneous symmetry breaking, non-zero energy Goldstone, modes with dissipation are excited in a non-equilibrium stationary state with space-time structure. In this paper, as a specific example, the Ward-Takahashi identities formulated in the close time path Green's function method is applied to the saturation state of a single mode laser. A generalized Goldstone theorem in a weak inho-mogeneous dissipative system is established and the physical interpretation of the Goldstone mode is discussed. As a result of the Goldstone theorem, the pole in the Green's function of the laser light splits into two with equal weights, each corresponding to a quanta with the same frequency but different dissipation. Together with the order parameter (the average value of the vector potential), these two kinds of quanta (one of which is the Goldstone mode) give a complete description of the order-disorder transition of the phase symmetry in the saturation state of the laser. A detailed discussion on the restoration of the spontaneously broken symmtry of the phase is given.
STRUCTURE AND STABILITY OF POLYTROPIC FLUID SPHERES WITH NEGATIVE INDEX WITHIN THE GENERAL RELATIVISTIC THEORY
Authors: CHU YAO-QUAN  , CHEN FU-ZHEN  , FANG LI-ZHI  ,   中国科学技术大学天体物理研究室
Published: November 2020

Based on the general relativistic theory, an investigation on the polytropic fluid spheres with negative index is made. The difference between classical gravitational theory and the relativistic one is measured by a parameter σ, which is the ratio of pressure to density at the center of the sphere. The relativistic Emden functions for ned* increases with the value of σ.
ON THE ABSENCE OF THE PHASE TRANSITION IN A LOW-DIMENSIONAL MAGNETIC SYSTEM WITH MULTI-QUADRATIC EXCHANGE INTERACTIONS
Authors: TAO RUI-BAO  , PU FU-CHO  ,   (1)复旦大学物理系; (2)中国科学院物理研究所
Published: November 2020

It is proved rigrously that the long range order for isotropic multi-quadratic Heisenberg model is absent in the 1 and 2-dimensional systems.
ELLIPSOMETRIC SPECTRA OF SiO2 FILMS ON SILICON
Authors: MO DANG  , CHEN SHU-GUANG  , YU YU-ZHEN  , HUANG BING-ZHONG  ,   中山大学物理系
Published: November 2020

An apparatus for measuring the ellipsometric spectra has been set up in our laboratory. From the experimental values of Imax,Imin and θmin, it is easy to determine the ellipsometric parameters ψ, △ as functions of wavelengths. The ellipsometric spectra of SiO2 films of several thicknesses on silicon have been determined. When comparing the experimental data with the theoretical curves calculated by computer, we find that they are generally in agreement. The ellipsometric spectrum method for measuring the film thickness has also been compared with the extinction method.
THE SURFACE STRUCTURE OF GaAs(110)
Authors: ZHANG KAI-MING  , YE LING  ,   复旦大学现代物理研究所
Published: November 2020

The rotational relaxation of the GaAs (110) surface is considered. A cluster model is used for simulating the crystal surface, and some quasi atoms are added in order to saturate the dangling bonds in the cluster boundary. The stable relaxation geometry of the GaAs (110) surface is determined by minimizing the total energy of the cluster calculated by the Extended Huckel Method. According to the calculation a value of 18° for the tilted angle of the surface bond is suggested, it is in fairly good agreement with that given by the partial yield photoelectron spectroscopy. The density of states for the cluster is also calculated, it is shown that for this relaxation model there is no empty cation state existing within the band gap.
THE LONG TIME ASYMPTOTIC BEHAVIOUR OF THE CORRELATION FUNCTIONS——THE INFLUENCES OF THE WAVES ON THE RELAXATION PROCESSES
Authors: HUO YU-PING  ,   中国科学院等离子体研究所
Published: November 2020

Based on the general theory of the non-equilibrium statistical mechanics, we have discussed the influences of waves on the relaxation processes in macroscopic systems, especially. about the non-exponential asymptotic behaviour of the correlation functions.Because, how to select the representation is important for discussing the dissipative processes in non-equilibrium statistical mechanics, it is desirable to start from the elementary excitation representation. Using the Basic idea of C* algebra theory, we have developed a method for operator expansion, and employed it to express the flow operators in second quantized elementary excitation representation. Taking the residual interaction between the elementary excitations as perturbation in the calculation of the resolvent of the Liouville operator, and using the method of projection operator, a general expression of the non-exponential decaying part of the correlation functions have been obtained.By analysing the procedure of treating the elementary excitation spectrum, we devided the residual interaction into two parts. For pure dissipative mode, taking into account the linear interaction, the main terms of the non-exponential decaying part(t(-d/2) term) were obtained. Detailed analysis shows that, the non-linear interaction (mode-mode coupling) is very small, and leads to a relatively faster decaying process (t(-d) or so), hence it can be neglected.This article emphasizes that, for the wave processes, the local fluctuation correlation, the particle self-correlation and the transport processes are different in nature. Their relative magnitudes (relative to the corresponding quasi-particle parts) may also be quite different.With these general results, we have analysed briefly the relaxation processes in liquid, and made some discussion about the so called mode-mode coupling theory.
ELECTRIC DISCHARGE PUMPED XeBr LASER WITH HIGH POWER AND HIGH EFFICIENCY
Authors: CHEN JIAN-WEN  , FU SHU-FEN  , LIU MIAO-HONG  ,   中国科学院上海光学精密机械研究所
Published: November 2020

The results of studies on XeBr laser output behaviour are reported; in this laser, HBr, BBr3 and C2F4Br2 are used as bromine donor. The maximum energy obtaind is 6 mJ. Volume energy density and efficiency are 0.4J/L, 0.14% respectively. Filially, we propose a way for improving the lasing output level.
MODIFICATION OF THE SENSIBILITY EQUATIONS OF VARIOUS INFRARED SYSTEMS
Authors: Zhang You-wen  ,   上海交通大学
Published: November 2020

When the target is a grey body, especially when its temperature is nearly equal to that of circumferential bodies, the target's self-radiation and the circumferential radiation reflected by the target must be considered. Thus, the sensibility equations of various infrared systems have to be modified. According to these modified equations, we can explain some experimental phenomena that-can not be interpreted by the unmodified equations in which only self-radiation is taken into account.Here we discuss the thermal imaging systems in detail and the effects of following factors on them. These factors are: the temperature differential emissivity differential and reflectivity differential of adjacent detecting elements in the scene and the scanning efficiency scanning superposition ratio series or parallel arrangement of detector arrays additional field lens or immersion lens and so on. Then, we obtain the more complete sensibility equations and the formula of the noise equivalent temperature differential NETD for thermal imaging systems. The calculation methods of XT in NBTD are described and the numerical tables of XT are given.
INFRARED ABSORPTION OF OXYGEN IN SILICON AND GERMANIUM AT LOW TEMPERATURES
Authors: Xu Zhen-jia  , Chen Yu-zhang  , Jiang De-sheng  , Song Chun-ying  , Li He-cheng  , Song Xiang-fang  , Ye Yi-ying  ,   (1)武汉大学物理系; (2)冶金工业部有色金属研究院; (3)中国科学院半导体研究所
Published: November 2020

Infrared Absorption measurements of oxygen in silicon and germanium were made with IE Fourier Transform Spectrometer at temperatures between 6 K and 300 K in the region of 400-4000cm-1. Resolution was up to 0.5cm-1 when high resolution conditions were adopted.Detection limit and sources of error on oxygen concentration of silicon and germanium determined by infrared absorption measurement at low temperature were identified. Using a 2 cm thick sample, the- lower limit of detectability for oxygen at 20 K is estimated to be 9.6×1014 oxygen atom. cm-3 and 3.0×1014 oxygen atom. cm-3 in silicon and germanium respectively. The oxygen concentration of CZ germanium single crystals with different growth conditions was also studied and these results determined by IE measurements havebeen investigated and discussed at temper-lithium precipitation technique.Temperature-dependent fine structure of 1106 cm-3 absorption band of silicon with different oxygen concentration have been investigated and discussed at temper atures between 6 K and 300 K.
TRANSFORMATION PROPERTIES OF THREE SETS OF CLOSED TIME PATH GREEN'S FUNCTIONS
Authors: ZHOU GUANG-ZHAO  , YU LU  , HAO BAI-LIN  ,   中国科学院理论物理研究所
Published: November 2020

In this article, we derived the transformations among three sets of elosed time path Green's functions and some calculation rules, from which a general definition of arbitrary multipoint retarded and advanced Green's functions follows naturally. Some algebraic identities among multipoint functions have shown to be the consequences of the property W[J+,J-](J+=J-=J)=0 for the generating functional on the closed time path.
A STUDY ON GROWTH CONDITION OF FeOOH (Ⅱ)
Authors: DU YOU-WEI  , LU HUAI-XIAN  , ZHANG YU-CHANG  , JIAO HONG-ZHEN  , FAN DE-PEI  ,   南京大学物理系
Published: November 2020

The paper describes the condition of forming α-FeOOH in the alkaline solution and tlie various factors that influence the phase composition.
THE THEORY OF RESONANTLY ENHANCED FOUR-WAVE MIXING IN ABSORBING MEDIA
Authors: FAN JUN-YING  , WU CUN-KAI  , WANG ZHI-YING  ,   中国科学院上海光学精密机械研究所
Published: November 2020

In this work, the exact result of the problem of four-wave mixing in resonant absorbing media has been obtained. The effects of the degenerate four-wave mixing in the Nd3+: glass were calculated, the theoretical results agree well with the experimental measurement.
DISCHAGE-PUMPED MULTIWAVELENGTH LASER
Authors: Fu Shu-fen  , Chen Jian-wen  , Liu Miao-hong  ,   中国科学院上海光学精密机械研究所
Published: November 2020

The coherent radiation of ten species, F,Ne,N2,N2+,XeF,XeCl,XeBr, KrF, KrCl, ArF were obtained by using a high pressure UV pre-ionization dischage device and varing lasing gases in a laser. The laser parameters and the output behaviour were also given.
NONEQUILIBRIUM STATISTICAL FIELD THEORY AND CRITICAL DYNAMICS (Ⅰ)——GENERALIZED LANGEVIN EQUATION
Authors: ZHOU GUANG-ZHAO  , SU ZHAO-BIN  , HAO BAI-LIN  , YU LU  ,   中国科学院理论物理研究所
Published: November 2020

Starting from the equations satisfied by the vertex functions on the closed time path, we derived the generalized Langevin equations for the order parameters and the conserved variables. The proper form of the equations for the conserved variables, including automatically the mode coupling terms, was determined from the Ward-Taka-hashi identities and the linear response theory. All existing dynamic models were recovered by assuming the corresponding symmetry properties of the system. The whole theoretical framework is also applicable for describing the systems near steady states far from equilibrium.
NONEQUILIBRIUM STATISTICAL FIELD THEORY AND CRITICAL DYNAMICS (Ⅱ)——LAGRANGIAN FIELD THEORY FORMULATION
Authors: ZHOU GUANG-ZHAO  , HAO BAI-LIN  , YU LU  ,   中国科学院理论物理研究所
Published: November 2020

The expression of the effective action for the order parameters is derived from the continuous integral representation for the generating functional on the closed time path in the one loop approximation for the Fourier transforms. The Lagrangian formulation of the critical dynamics is recovered in the second order approximation of fluctuations in the closed time path continuous integral. The various possibilities of improving the existing theory of critical dynamics are considered.
ENERGY BAND THEORY OF HETEROMETAL SUPERPOSED FILM
Authors: ZHANG LI-YUAN  , YIN DAO-LE  ,   北京大学物理系
Published: November 2020

In this paper, we introduced the concept of the interface plane wave orbits (IPWO). A method for calculating the interface electronic structure of heterometal superposed film was given. It is called MTO-IPWO-PWO Method.
THE SECOND ORDER TRAJECTORIES AND TRANSFER FORMULAE IN CROSSED TOROIDAL ELECTRIC AND INHOMOGENEOUS MAGNETIC FIELDS
Authors: CHEN REN-SHU  , XIMEN JI-YE  ,   北京大学无线电电子学系
Published: November 2020

The second order ion trajectories in crossed toroidal electric and inhomogeneous magnetic fields are derived by means of the Fermat's principle and expressed in energy deviation. The ion trajectory formulae may be transferred into velocity or momentum deviation. The transfer formulae between different deviations are given in detail.
THE COHERENT RENORMALIZATION THEORY OF COLLISIONLESS PLASMA
Authors: ZHANG YANG-ZHONG  ,   中国西南物理研究所
Published: November 2020

A renormalization procedure for the perturbative manipulation of Vlasov-Poisson equation has been proposed in this paper. By the graphical expansion method the theory is shown to be renormalizable to any order, and the renormalized propagator is given. The physical meaning of the coherent terms and the absolute incoherent terms is analyzed. The correct expression for the renormalized dielectric function is given and its significances are discussed. By comparison with previous renormalization theory, it is pointed out that this procedure is a true complete renormalization.
INVESTIGATION OF LASER HEATING OF PLASMAS
Authors: XU ZHI-ZHAN  , LI AN-MING  , CHEN SHI-SHEN  , LIN LI-HUANG  , LIANG XIANG-CHUN  , OUYANG BIN  , BI WU-JI  , HOU SHING-FA  , YIN GUANG-YU  , ZHANG SHU-GAN  , PAN CHENG-MING  ,   中国科学院上海光学精密机械研究所
Published: November 2020

We have studied the interaction between the 1010 W Nd glass laser pulses with a leading edge of about 1ns and several planar targets made of deuterium-contained materials. In our experiments, the neutron yields, electron temperature and various characteristics (such as reflectivity, temporal, spatial and spectral structure) of the backward-reflected laser light from the plasmas have been mainly measured.
THE OBSERVATION OF DEFECTS IN SYNTHETIC QUARTZ BY X-RAY TOPOGRAPHY
Authors: MAI ZHEN-HONG  , GE PEI-WEN  , CUI SHU-FAN  , WU LAN-SHENG  ,   中国科学院物理研究所
Published: November 2020

The grown-in defects in a synthetic quartz crystal grown from a 2-cut seed plate have been surveyed by X-ray topography and ion probe method. Besides usual dislocations, it has also been found some rare fault surfaces which have not been reported so far. The configuration, fault vector and formation of the fault surfaces are discussed.
POSSIBLE ORIGIN OF THE FMR LINEWIDTH ANISOTROPIES IN YIG AND BCVIG SINGLE CRYSTALS
Authors: ZHANG PENG-XIANG  , MO YU-JUN  ,   中国科学院物理研究所
Published: November 2020

We propose a possible origin of FME linewidth anisotropy shown in mechanically polished YIG and BCVIG single crystals. The stresses left on the surface of the spheres of these crystals couple with the magnetization through the magnetostriction effect, and thus give rise to an additional linewidth, which is anisotropic due to the anisotropic magnetostrictive constant. Supposing that the damaged layer is mainly composed of high density dislocations, a relation between the FME linewidth anisotropy and the magnetostriction constants is deduced based on micromagnetism theory and the two-magnon scattering process. From the measured linewidth anisotropy of YIG, we evaluated the dislocation density of the surface layer to be 5.4×1010/cm2.This relaxation process shows that in order to further reduce the linewidth of an ultra-low linewidth polycrystalline material, suppressing the magnetostriction constant may play an important role.
SENSITIVITY OF THE RADIUS OF CONVENGENCE OF THE SERIES FOR SUPERCONDUCTING Tc TO THE HIGH-FREQUENCY BEHAVIORS OF PHONON SPECTRAL FUNCTION
Authors: LEI XIAO-LIN  ,   中国科学院上海冶金研究所
Published: November 2020

On the basis of a recent discussion on the analytical properties of the first order equation for Tc, we show, by concrete examples, that the radius of convergence of the series for superconducting critical temperature is so sensitive to the high-frequency behaviors of the phonon spectral function, that it is inadequate for it to serve as a critical quantity in the criterion for dividing superconductors into type A and type B.
THE SPHERICALLY SYMMETRIC AND STATIC SOLUTIONS IN THE L?U(1) GAUGE THEORY OF GRAVITATION
Authors: ZHANG YUAN-ZHONG  , LIU YU-FEN  ,   中国科学院理论物理研究所
Published: November 2020

It is more difficult to find an exact solution of the field equations in the gauge theory of gravitation as compared with finding that in Einstein's theory. As far as some problems in physics are concerned, however, it is sufficient to obtain a Newtonian approximate solution and a post-Newtonian approximate solution. In this note the L?U(1) gauge theory of gravitation is discussed. A special exact solution and the approximation to first order to the spherically symmetric and static field of a charged mass point are obtained.
INVESTIGATION ON SIX-BEAM LASER SYMMETRICALLY IRRADIATING MICROSPHERICAL TARGETS
Authors: XU ZHI-ZHAN  , LI AN-MING  , CHEN SHI-SHENG  , LIN LI-HUANG  , LIANG XIANG-CHUN  , OUYANG BIN  , YIN GUANG-YU  , HE XING-FA  ,   中国科学院上海光学精密机械研究所
Published: November 2020

This paper reports the results of the investigation on six-beam ns laser symmetrically irradiating (CD2)n mierospherical targets.
EVOLUTION OF TOKAMAK PLASMA DURING FAST HEATING
Authors: SHI BING-REN  ,   中国西南物理研究所
Published: November 2020

The approximate description of tokamak plasma evolution during fast heating is discussed. The equilibrium configuration of two important types of flux-conserving evolution of tokamak plasma are obtained: the adiabatic compression and the noncom-pressional fast heating. It is assumed that the plasma shape is noncircular with small arbitrary deformations from the average circles and there exists only one elliptic magnetic axis for the initial configuration. By means of expansion of the plasma parameters in terms of the inverse aspect ratio the problem becomes tractable analytically. It is demonstrated that this method can be used successfully to describe the evolution sequence of adiabatic compression; as far as the noncompressional fast heating is concerned. The results are also in consistence with that of two-dimensional computation if the displacement of the magnetic axis (or the poloidal beta value) remains not very large.
THE COHERENT RENORMALIZATION AND THE DIA
Authors: ZHANG YANG-ZHONG  ,   中国西南物理研究所
Published: November 2020

The purturbative expressions for response function R and inverse dielectric function ε-1 has been established in the paper by using the concept of the coherent renormalization according to their primitive definition. By comparing the obtained equations with those in the MSR scheme, we pointed out that the two agree quite well in form with each other at least within the sixth order, and thus justified the reliability of the coherent renormalization. The differences between the two were analysed in more detail and its relation with DIA were also discussed.
THE MEASURMENTS OF THE REFRACTIVE INDICES AND THE TRANSMISSIVITIES OF Sr4NaLiNb10O30 SINGLE CRYSTALS
Authors: MAI ZHEN-HONG  , ZHOU TANG  ,   中国科学院物理研究所
Published: November 2020

It was the first time to investigate the refractive indices and the transmissivities of Sr4NaLiNb10O30 single crystals grown by the Czochralski method in the visible wavelength region. The experiment errors were discussed.
THE COMBINATION OF ANOMALOUS SCATTERING METHOD AND DIRECT METHOD
Authors: FAN HAI-FU  , HAN FU-SEN  , ZHENG QI-TAI  , GU YUAN-XIN  ,   中国科学院
Published: November 2020

For certain types of crystal structure containing heavy atoms, it is some times dif-ficult to obtain the unique solution by the conventional method such as Patterson method, heavy atom method or direct method. Incorporating the anomalous scattering information into the direct method would facilitate the solution of the difficulty. This has been proved with a typical known structure.
EXCITATION AND INTERACTION OF MULTI-MODE LATTICE VIBRATIONS IN α- LiIO3 CRYSTAL UNDER IRRADIATION OF AN INTENSE LASER
Authors: XU LI-WEN  , LEI ZI-MING  , ZHAO RU-WEN  , SHE YONG-BO  ,   中国科学院物理研究所
Published: November 2020

We have observed various spectra of stimulated Raman scattering (STRS) in a-LiIO3 crystal in different scattering geometries under irradiation of an electro-optically Q-switched second harmonic YAG laser. It is shown experimentally that more multi-mode lattice vibrations .can be excited by extra-ordinary incident photons than by ordi-nary ones. We have also observed the first and second order Stokes and anti-Stokes scat-tering lines of E1 mode, which are strong in intensity. The first, second and third order polariton Stokes and anti-Stokes lines are observed, as well as a new spectral line with a frequency shift of 496 cm-1 in anti-Stokes frequency region, which may be attributed to interactions among polaritons with various modes.Fatigue phenomena of Raman activation for the crystal have also been indicated experimentally.
THE CHARGE TRANSFER AND SPLITTING OF 4d ORBITALS OF Mo ATOM IN CHEVREL PHASE MxMo6S8 COMPOUNDS
Authors: WU GUO-ZHEN  ,   中国科学院化学研究所
Published: November 2020

In this paper, the ligand field method is applied to derive an analytic expression relating the charge transfer between M and Mo6S8 cluster and the splitting of the 4d orbitals of Mo atom for Chevrel phase MzMo6S8 compounds. From the reflection spectrum of PbMo6S8 the charge transfer from Mo6S8 cluster to Pb atom is calculated to be 1.18 instead of 2 electrons being transferred from Pb atom to Mo6S8 cluster as generally recognized in previous literatures. The number of 4d electrons on Mo6 is therefore 18.8.
IMPROVEMENTS ON THE FLUCTUATION MODEL OF PASSIVELY MODE-LOCKED LASERS
Authors: ZHU ZHEN-HE  , HUO CHONG-RU  ,   中国科学院物理研究所
Published: November 2020

The fluctuation model of passively mode-locked lasers has been improved. A com-puter simulation of the evolution of light pulses was performed. The simulation started at the point when the gain coefficient had just increased to the threshold value. The starting average intensity was calculated in accordance with the spontaneous emission The rate of pumping, the life-time of the upper laser level and the ratio of the area of beam section at the gain medium to that at the saturable absorber were taken into ac-count. The calculation has been done for Nd-glass and Nd: YAG lasers.The simulation calculation led to the following conclusions: (1) It is impossible to obtain complete mode locking with a confidence over 93% when the pumping rate exceeds the threshold value by 15 to 20%. (2) The optimum ratio of the area of the beam sections is from 1/2 to 1 for Nd-glass lasers, and larger than 2 for Nd: YAG lasers. (3) To obtain complete mode locking the transmission of the saturable dye must be within a certain range (depending on the loss coefficient and the ratio of the beam sections). The transmission of the dye for Nd-glass lasers should be higher than that for Nd: YAG lasers, if the same dye is employed.Finally, the shortcomings of Glenn's calculation are pointed out.
INVESTIGATION OF DEGENERATE FOUR-WAVE MIXING AND PHASE CONJUGATION IN ORGANIC DYE SOLUTIONS
Authors: WU CUN-KAI  , FAN JUN-YIN  , WANG ZHI-YING  ,   中国科学院上海光学精密机械研究所
Published: November 2020

Phase conjugation of backward-and forward-wave produced by degenerate four-wave mixing using a nearly resonantly enhanced nonlinearity in four-level organic dye solutions was investigated. The conversion efficiency of 22% had been obtained in a 2.5 X 10-5 - molar solution of Chlorophyll A in methylalcohol with a 5 mm interaction length and a pumping energy of ～ 8 mJ from SH of a Q-switched Nd: YAG. Degene-rate four-wave mixing by two-photon resonant-enhancement in the solution of rhodamine 6G in alcohol was studied. Measurements were performed which described the dependence of nonlinear reflectivities on the molar concentrations of the media and the intensities of the pumping and object waves. Phase conjugation characteristics of forward-wave in four-wave mixing process were theoretically analysed. Experiments have cofirmed the theoretical prediction. The method of quartet degenerate four-wave mixing had been ex-tended to the doublet degenerate case. Using this method image conversion from 1.06 μm to 5320 ? had been realized with a conversion efficiency of 25% in a 5 mm long satu-rable absorber made of organic dye 9740 solution in dichloroethane. Theoretical analy-sis showed that using a medium, which is a near resonant absorber for the infrared object wave but is transparent for the visible reconstruction wave, the conversion efficiency may be well in excess of unity.
THE NEEDLE-LIKE STRESS ZONES AND DISLOCATIONS DUE TO CONSTITUTIONAL SUPERCOOLING IN CZOCHRALSKI METHOD-GROWN YAG SINGLE CRYSTALS
Authors: GE CHUAN-ZHEN  , XU XIU-YING  , FENG DUAN  ,   南京大学固体物理研究所
Published: November 2020

In this paper, we studied the relationship between the morphological development of the solid-liquid interface and the needle-like stress zones in Czochralskimethod-grown YAG single crystals doped with Nd. The experimental results established that the needle-like stress zones were originated from the solute (Nd) -rich zones due to constitutional supercooling. By studying the needle-like stress zones with photo-elasticity method, the stress in these zones was found to be axially symmetrical comperssive. We have also studied dislocation arrays along the boundaries of solute (Nd)-rich zones by means of etching method and birefringence observation, and measured the dis location density. The measured density agrees roughly with the value estimated according to the theory of misfit dislocations.
STUDY OF THE MAGNETIC PROPERTIES AND M?SSBAUER EFFECT OF A Fe-Cr-Co-Si PERMANENT MAGNETIC ALLOY
Authors: LI GUO-DONG  , FENG MIN-YING  , SHAO HAN-RU  , LI SHI  , WU WEI-FANG  , LI DONG-SHENG  ,   (1)天津冶金研究所; (2)中国科学院高能物理研究所; (3)中国科学院物理研究所
Published: November 2020

A workable permanent magnetic alloy was studied. Its composition was 65Fe-22Cr-12Co-l Si (in wt%). The temperature dependence of the magnetic saturation moment and the M?ssbauer spectra under room temperature and at about 80K were investigated for the quenched samples as well as those which was the heattreated in magnetic field and aged, the parameters of a spectrum were calculated. It was showed from experiments that the magnetic properties of these two kind of samples were changed in the heating and cooling cycles in measurements. For the aged sample, a paramagnetic phase appeared under room temperature in addition to the ferromagnetic phases, this paramagnetic phase transformed into ferromagnetic phase at low temperatures. An incomplete orientation effect of the magnetic moment was discovered. Finally, the reverse magnetization mechanism and the tentative way of improving coercive force were discussed.
PHASE IN Fe-C, Fe-C-Sb ALLOY SYSTEMS OBTAINED BY SPLAT QUENCHING
Authors: WU DE-HAI  , LIN ZHI-WEI  , LI CHUN-LI  , LIANG GUANG-QI  , LU JIN-WEN  , CHEN XI-CHEN  , YI SUN-SHENG  , WANG ZU-LUN  ,   (1)清华大学; (2)中国科学院物理研究所
Published: November 2020

An ε metastable phase of h.c.p. structure has been obtained in the alloy systems Fe-C, Fe-C-Sb by means of splat quenching. The ε phase is a solid solution the lattices constant of which increases with increase of Sb and C, but the value c/a is approximately constant. The ε phase of the Fe-C-Sb alloy is fairly stable thermally. DTA shows that the ε phase is non-dissociative below 125℃ and the addition of Si and Sb increases the stability. The grain size of the e phase is of the order of 10-1 micron. Our work verifies that of R.C. Ruhl and M. Cohen et al. concerning the e phase of the Fe-C-Si alloy. The topography of this ε phase has been studied by means of scanning and transmission electron microscopy.
INJECTION LOCKING OF DYE LASERS
Authors: PAN SHAO-HUA  , TANG XIAO  , FENG BAO-HUA  ,   中国科学院物理研究所
Published: November 2020

The phenomena of injection locking of dye lasers have been observed experimentally. Expressions for the competition between injected and non-injected modes are deduced according to the semiclassical theory of lasers. The results are in relatively good agreement with experiments.
MEASUREMENT OF ALL COMPONENTS OF THE ELECTRO-ELASTIC TENSOR FOR α-LiIO3 CRYSTAL
Authors: LIU HONG-JU  , ZHAO ZHE-YING  , SHI ZHONG-JIAN  ,   中国科学院声学研究所
Published: November 2020

The persent work discusses the method of measuring the all components of the electro-elastic tensor for the α-LiIO3 crystal (LI). By means of theory of the thickness vibrational mode for piezoelectric plates, calculating formula of independent electro-elastic constants for LI had been developed. We measured the nonpiezoelectric-coupled elastic constants c11E and c66E by method of measuring velocity with acousto-optic synchronism, Finally, the 52 data of all components of the electro-elastic tensor and some of the electromechanical coupling factors for LI are given.
TRAVERSE TRANSPORT COEFFICIENTS OF PLASMA IN HOMOGENEOUS STRONG MAGNETIC FIELD
Authors: HU XI-WEI  , HUO YU-PING  , CHEN ZHENG-XONG  , ZHANG CHENG  ,   中国科学院等离子体物理研究所
Published: November 2020

The traverse transport coefficients of plasma in strong magnetic field have been calculated by Kubo formulas and Landau representation. They are diffusivity, thermal-conductivity and viscosity. The method used in this paper is better than the general one of solving Boltzmann equation.1) The system, which is in strong magnetic field and subjects to multibody interaction, can be calculated without difficulty in principle. 2) It's physical model is simple and clear. 3) The analytic expressions of traverse transport coefficients can be obtained by calculating the matrix trace. Finally, we give a comparison between our results and general results obtained from Chapman-Enskog method.
THE AMBIPOLAR ELECTRIC FIELD AND THE AMBIPOLAR DIFFUSION IN A STOCHASTIC MAGNETIC FIELD
Authors: ZHANG CHENG-FU  , WU WEI-MIN  ,   北京大学物理系
Published: November 2020

It is shown that the transport of the plasma immersed in a stochastic magnetic field (s.m.f.) must lead to the producing of an ambipolar electric field. In this paper, the transition probability of charged particels in the s.m.f. was derived in the case of existing a transverse electric field. The transport fluxes and the ambipolar electric field were then calculated. The result shows that the ambipolar electric field is insensitive to the collision between particles. ((|e|E)/Te=-A1/ne(dne)/(dx), A is a coefficient ofabout 1, which depends on collision insensitively.) This ambipolar electric field may be used as a necessary (but not sufficient) criterion of ascertaining whether the effect of s.m.f. on the plasma transport is important. In the transport process induced by s.m.f. the impure ions transport more rapidly than hydrogen ions (VI/Vi≈[mi/mI]1/2ZI>1), this result can be used to explain the phenomenon in Tokamak experiment, i.e., when there appears interior disruption, the impurities will be extracted from centre region instead of being cumulated. We discussed also the effect of collision and the condition under which the above treat-ment is applicable. In the case of high collision, the diffusion flux is a much smaller quantity. The corresponding dynamic equation of plasma in a s.m.f. has been derived, it is somewhat different from that obtained by K. Molvig et al. in [3].
A NEW METHOD OF SOLVING THE TAKAGI EQUATION OF THE DYNAMICAL THEORY OF X-RAY DIFFRACTION
Authors: SUN ZHANG-DE  , LIANG JING-GUO  ,   北京大学物理系
Published: November 2020

The Takagi equation of the dynamical theory of X-ray diffraction is solved by the method of characteristic curve. The expressions of the strict and approximate solution have been derived. The meaning of Borrmann triangle is explained by the solution. To the first order, this expression of approximate solution is simple and explicit and coincides with known theory and basic experiments.
STATISTICAL THEORY OF A ONE-DIMENSIONAL INTERACTIVE KINK-PHONON GAS
Authors: YANG ZHEN-QING  ,   南开大学物理系
Published: November 2020

This paper systematically studies and improves the statistical theory of the kink-phonon interactive mixture in a one-dimensional model for the displacive phase transition. By taking applicable forms of the path integral for both the partition functions of kink and phonon and altering the method in calculating the path integral of phonon, a more reasonable and general expression of the partition function of the Grand ensemble is obtained. Under the lowest eigenstate approximation, the Grand.partition function may be reduced to a result similar to that of reference[6]. Under the classical approximation, the average density of the kink calculated from the Grand partition function is in agreement with the result of the computer simulation better than those obtained in earlier publications.
THE OXIDIZING PROCESS OF Fe3O4 ULTRAFINE PARTICLES
Authors: DU YOU-WEI  , ZHANG YU-CHANG  , LU HUAI-XIAN  ,   南京大学物理系
Published: November 2020

The conversion of magnetite to maghemite has been studied by M?ssbauer effect. That is a nucleation and growth process of γ-Fe2O3. The change of the concentration of Fe3O4 with time was determined by the change of magnetic moment in the oxidizing process. The chemical reaction formula, -dC/dt = mC3, is only appropriate for the starting stage of the oxidizing process.
SOUND INTERACTION AMONG SPHERICAL PARTICLES
Authors: QIAN ZU-WEN  ,   中国科学院声学研究所
Published: November 2020

In this paper, we considered the scattering of a plane sound wave in a medium which contains many spherical particles, for example, a concentrated suspension in a liquid. The sound interaction field and the equivalent scattering cross section of a partical have been calculated. When dimensions of the particles are much less than the sound wave-length, the following conclusions can be drawn, a) On account of the interaction, the scattering cross section must have a multiplying factor Q. Geometrically, it is due to the masking effect on each other, and Q= |1-(γ0A0(1)+γ＇1A1(1)|2 is called masking factor, b) The dependence of scattering coefficient on partical concentration is no longer a linear one. c) When the dimensions of them are much less than the sound wavelength but larger than viscous wavelength, the scattering coefficient of them will obey Rayleigh's law. But when their radii are near or less than viscous wavelength, the scattering co-efficients will show a dependence on frequency that is higher than the fourth power.
ON THE STABILITY OF THE MULTIVARIABLE MASTER EQUATION FOR NON-EQUILIBRIUM SYSTEMS
Authors: LI ZHAN-BING  , YAN SHI-JIAN  , LIU RUO-ZHUANG  ,   (1)北京师范大学化学系,北京师范大学量子力学小组; (2)北京师范大学数学系; (3)北京师范大学数学系,北京师范大学量子力学小组
Published: November 2020

In this paper, by using the concepts " entropy production" and "excess entropy production", the Lyaponov stability of the master equation in linear and nonlinear range has been discussed. The results obtained are consistent with the stability theory of the time evolution equation of macroscopic non-equilibrium systems discussed by I. Prigo-gine. In addition, the concept of "probability flow" is proposed for the multivariable master equation of the stochastic model of non-equilibrium systems, and the method of decomposition of "probability flow" is given.
ON THE PROBLEM OF THE ENERGY OF GRAVITATIONAL FIELD
Authors: ZHENG YU-KUN  ,   北京工业大学应用数学系
Published: November 2020

In this paper, we discuss the problem of the local energy content in gravitational fields. A new total energy-momentum density pseudo-tensor of gravitational field is given In this paper. The energy content in any part of a gravitational field given by the new pseudo-tensor is an invariant under arbitrary purely spatial transformation, hence the local energy content in the gravitational field has a well-defined physical meaning. For the energy and momentum of a Schwarzschild gravitational field, the results given by the new pseudo-tensor are more reasonable than those given by other pseudo-tensors pro-posed in the literatures of the general theory of relativity.The relation between mass and energy in the theory of gravitation is also discussed.
THE ASYMPTOTIC PROPAGATION FUNCTION AND THE DISPERSION RELATION IN RQL THEORY OF PLASMA
Authors: ZHANG YANG-ZHONG  ,   中国西南物理研究所
Published: November 2020

In this paper, a representation theory in 6-dimensional phase space for Klimonto-vich-Vlasov system is introduced. By using this theory, the relation between the Mis-guich-Balescu's one-particle asymptotic propagator and the Dupree's average Green function is analyzed. It is found that they coincide in the stationary Markovian process, by using them the divergence difficulty of resonance function in the MB's non-linear dispersion relation is resolved. It is pointed out that the divergence difficulty arises from the failure of the concept of fluctuation production operator introduced by MB in their sub-dynamics for the multiple-time-scale perturbation theory.
SELECTIVE EXCITATION OF NARROW LINES IN Nd3+ DOPED LASER GLASSES
Authors: CHEN SHU-CHUN  , DAI FENG-MEI  ,   中国科学院上海光学精密机械研究所
Published: November 2020

Using a narrow line output of tunable pulsed dye laser, the inhomogeneously broadened absorption band of 4I9/2→4G5/2 in Nd3+ doped germate, silicate, phosphate, fluo-rophosphate and fluoroberyllate glasses were selectively excited at low and room temperatures. Wavelength dependence of fluorescence decay were observed to investigate the decay nature and interaction of Nd3+ ions at different site in different glass hosts.
A NEW REPRESENTATION OF THE LIGHT FIELD
Authors: LI XIAN-SHU  ,   中山大学物理系
Published: November 2020

A new representation of the light field is proposed in this paper. It is shown that the wave theory of the light propagation can all be putted into a more convenient and more complete scheme of a matrix theory when the new representation is adopted. Some general fundamentals of this matrix theory are given, and the convergence of the action matrix is also proved in the general case.The expression of the light field proposed here involves the general characteristics of the monochromatic scalar wave field with only one propagation axis. It can also demonstrate explicitly the axial symmetry and the radial distribution features of this field on the plane which is perpendicular to the propagation axis. By virtue of this expression, some general laws of the distribution of the field on the plane, including the qualitative law of the distribution of the symmetries of the field along the radial direction, are obtained for the first time.
INELASTIC SCATTERING SPECTRA OF THERMAL NEUTRONS BY ALUMINIUM HYDRIDE (AlH3)n
Authors: RUAN JING-HUI  , CHENG ZHI-XU  , CHEN GUI-YING  ,   中国科学院原子能研究所
Published: November 2020

Inelastic scattering spectra of Aluminium hydride (AlH3)n have been measured before and after the application of a hydrostatic pressure up to 50 kbar. Some fine structure peaks were observed. The results is compared with Roszinski's infrared spectrum, in the range from 600 to 1700 cm-1. They are in general agreement. Besides, three other peaks were observed, which are difficult to measure with infrared in lower frequeacy range. It seems that this material does not change in its thermodynamic character and microstructure after hydrostatic pressure treatment.
THE EFFECT OF ELECTRON IRRADIATION ON α-LITHIUM IODATE CRYSTAL STRUCTURE
Authors: LI FANG-HUA  , FAN HAN-JIE  , GAO JUN-JIE  ,   (1)天津大学; (2)中国科学院物理研究所
Published: November 2020

The electron irradiation effects on the crystal structure of α-lithium iodate (α-LiIO3) have been observed by TEM. Under the irradiation of medium-intense electron beam with energy 100 KeV, α-LiIO3 transforms into γ-LiIO3 at first and then into Li2O and an other new type of Li-O compound which is probably a nonstoichiometric one and re-fered to as X compound. If the irradiation is carried out with more intense electron beam, α-LiIO3 crystal melts quickly. In that case, either a decrease in intensity of electron beam or a break in irradiation leads to recrystallization of the melted substance in the form of X compound which gradually transforms into Li2O and metal Li under subsequent electron irradiation. The phase tansformation form X compound into Li2O is reversible to certain extent. Besides, it is found that the electron irradiation effects on the structure of α-lithium iodate monocrystal is clearly anisotropic.
INVESTIGATION OF MHD INSTABILITY OF NONCIRCULAR TOKAMAK PLASMA
Authors: WANG ZHONG-TIAN  ,   中国西南物理研究所
Published: November 2020

MHD instability of the noncircular cross-section plasma is investigated by using a step current profile model. A new criterion for the instability is obtained. It is a generalization of Zakharov's criterion for circular cross-section plasma. The effects of elliptical and triangular distortion, current gradient and the value of safety factor q on β value are indicated. The optimistic value of q for achieving the largest β value is also given.The critical β value for various plasma parameters is calculated and compared with the numerical results from the local instability and ballooning modes criteria. It is noted here that the current gradient affects the β value seriously. The noncircular cross-section plasma has advantage for obtaining higher β value.
THE DETERMINATION OF CRYSTAL STRUCTURE OF ASOSARMENTOSIN (II)——E-MAP WITH ENANTIOMORPHIC AMBIGUITY EETEIEVED BY MAKING USE OF THE COMPONENT RELATION
Authors: FAN HAI-FU  , ZHENG CHAO-DE  , ZHENG QI-TAI  ,   中国科学院
Published: November 2020

Phase degeneration occured during the solution of crystal structure of asosarmen-tosin by using symbolic addition procedure. This led to an E-map containing simultaneously both enantiomorphs. By making use of the component relation, this E-map has successfully been retrieved leading to an E-map containing only one of the enantiomorphs. It turns out that, with the help of component relation there is no need to modify the starting set even though phase degeneration occurs during the solution of noncentrosymmetric crystal structures by symbolic addition method. Hence the efficiency of the symbolic addition procedure can be improved.
FOURIER SYNTHESES OF THE MULTIPLE-SOLUTION TYPE
Authors: ZHENG QI-TAI  ,   中国科学院生物物理研究所
Published: November 2020

The problem of multiple solution is frequently a result of Patterson analysis. This problem can be solved by making use of the component relations or the phase relations of the multiple-solution type. A pseudo structure model containing simultaneously the actual structure and its symmetrical equivalents is in turn the basis for the application of the component relations or the phase relations of the multiple-solution type. The so-called Multiple-solution Fourier Syntheses is the Fourier syntheses based on the whole or partial pseudo structure model. This model can be developed and improved by this type of Fourier syntheses. A practical example is given.
A THEORETICAL CALCULATION OF METAL DRILLING BY LASERS
Authors: LU REN-XIANG  ,   中国科学院上海光学精密机械研究所
Published: November 2020

A "rectangular" phenomenological model of interaction between ms pulses of laser beam and metals has been set up. When power density is greater than the damage threshold, the metal possesses a constant ablation rate. A differential equation has been obtained by combining propagation of a Gaussian beam. Through numerical calculation, relations of the dependence of depth and shape of hole on the target position, lens focal length, directionality and energy of laser beam have been discussed.
THE IMAGING OF A GLASS SELF-FOCUING PLATE
Authors: CHENG KE-HUA  ,   中国科学院西安光学精密机械研究所
Published: November 2020

In this article, we studied the propagation of rays in a glass self-focuing plate, its imaging principle and its application.
A STUDY ON THE ANOMALY OF LOW-TEMPERATURE ELECTRICAL RESISTIVITY IN A-15 COMPOUNDS
Authors: LEI XIAO-LIN  ,   中国科学院上海冶金研究所
Published: November 2020

The formulas deduced in reference [6] for the electrical resistivity of substitu-tional alloys are applied to binary stoichiometric and completely ordered A-15 compounds. The comparison between theoretical expressions and experimental data shows that the main characteristics in the temperature dependence of resistivity in various types of A-15 compounds at low temperatures could be understood within the framework of [6], in spite of that there are remarkable differences between these two cases.
PARAMAGNETIC SUSCEPTIBILITY OF THE V3B TYPE OF A-15 SUPERCONDUCTING COMPOUNDS IN THE NORMAL STATE
Authors: ZHU YUAN-ZHEN  , PAN SHAO-HUA  ,   中国科学院物理研究所
Published: November 2020

According to the model of the relative displacement of the d subbands in reference [1], the paramagnetic susceptibility and its temperature dependence of V3B type of A-15 superconducting compounds are calculated. The results are roughly in agreement with experimental data.
CALCULATION OF SHG COEFFICIENTS OF NaNO2 CRYSTALS BY USING CNDO/S METHOD
Authors: CHEN CHUNG-TIAN  , LIU ZHI-PING  , SHEN HE-SHENG  ,   (1)中国科学技术大学; (2)中国科学院福建物质结构研究所
Published: November 2020

The molecular orbitals of (NO2)-1 grouping were calculated by using the all-valence electron semiempirical CNDO/S method. A general computer program for grouping theory of non-linear optical (ffects was then used to calculate the SHG coefficients of NaNO2. The agreement between the calculated values and the experimental ones was. found to be quite satisfactory without introducing any adjustable parameters. The results show clearly that the anisotropy of SHG coefficients of NaNO2 crystals is primarily due to the π molecular orbitals of (NO2)-1 grouping. The two-level model of SHG effects as well as its limitations have also been discussed in this paper.
THEORY OF INCLUSION AND APPLICATIONS IN THE STUDY OF FRACTURE
Authors: ZHANG HONG-TU  , ZHE XIAO-LI  ,   兰州大学物理系
Published: November 2020

Using Green functions in an infinite medium, the constraint stress field of an inclusion with general shape is given. The stress free strains of the inclusion may be functions of position. On this basis, all calculating formulas for plane problems are given. We consider cracks or holes as special inhomogeneities with elastic constants equal to zero. For a body stressed by the applied field, the stress-free strains of the equivalent inclusion have been calculated. For oblate inclusions, near the end of major axis of ellipse, the stress field exhibits a r-1/2 stress singularity similar to that of a crack. Some applications, including the interaction of a hole with the applied field, micro-crack nucleation due to martensite plates and deformation twins, are discussed.
TUNING OF A PULSED DYE LASER USING A COMPOUND CAVITY
Authors: XU ZU-TAN  , PAN SHAO-HUA  , DENG DAO-QUN  , GUO DONG-SHENG  , LI XIU-FANG  ,   中国科学院物理研究所
Published: November 2020

By means of tuning with a compound cavity, the output power of a pulsed dye laser can be increased several times and the output intensity be made almost independent of the frequency. The theory and experimental results are given as well as an example of a practical experimental device.
DYNAMIC PROCESS OFβ→α TRANSITION OF LiIO3 CRYSTALS UNDER HYDROSTATIC PRESSURE
Authors: YAO YU-SHU  , CHEN HONG  , XU JI-AN  , HE SHOU-AN  ,   中国科学院物理研究所
Published: November 2020

Pressure dependence of the average rate of β→α transition of LiIO3 at different temperature was measured up to 12 kbars. With increasing pressure, the average rate of transition first increased sharply, then passed a maximum after that the transition rate would decrease in a comparatively gradual manner. Brief discussion on the pressure effect was also given.
IRREVERSIBLE CHEMICAL REACTION-DIFFUSION EQUATION
Authors: CHEN LIANG-HENG  ,   吉林大学物理系
Published: November 2020

Applying BBGKY equation obtained from Liouville's equation to a system with many components, the irreversible chemical reaction-diffusion equation can be deduced.