//www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:39 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:39 zh Copyright ©Acta Physica Sinica All Rights Reserved. 京ICP备05002789号-1 Address: PostCode：100190 Phone: 010-82649829，82649241,82649863 Email: apsoffice@iphy.ac.cn Copyright ©Acta Physica Sinica All Rights Reserved apsoffice@iphy.ac.cn 1000-3290 //www.getgobooth.com/en/article/doi/10.7498/aps.32.689 Author(s): He Hua-chun <br/><p>There is a disorder-order transition in the PdAu25Fe21 and PdAu24Fe21Al4 alloys at critical temperatures of 500℃ and 550℃ respectively, The ordered phase is a superstructure of Cu3Au type. The disorder-order transition of the alloys brings about a physical change from the ferromagnetic state to antiferromagnetic state, considerable decrease in susceptibility and conductivity, and a change in the sign of thermo-electromo-tive force. The experimental results show that the anomalous behaviors of the alloys result from the atomic ordering and the change of d-band states.</p> <br/>Acta Physica Sinica. 1983 32(6): 689-696. Published 1983-03-05 Author(s): He Hua-chun <br/><p>There is a disorder-order transition in the PdAu25Fe21 and PdAu24Fe21Al4 alloys at critical temperatures of 500℃ and 550℃ respectively, The ordered phase is a superstructure of Cu3Au type. The disorder-order transition of the alloys brings about a physical change from the ferromagnetic state to antiferromagnetic state, considerable decrease in susceptibility and conductivity, and a change in the sign of thermo-electromo-tive force. The experimental results show that the anomalous behaviors of the alloys result from the atomic ordering and the change of d-band states.</p> <br/>Acta Physica Sinica. 1983 32(6): 689-696. Published 1983-03-05 AN INVESTIGATION ON THE ANOMALOUS ELECTRO-MAGNETIC BEHAVIORS OF PdAu25Fe21 AND PdAu24Fe21Al4 ALLOYS He Hua-chun 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 689-696. article doi:10.7498/aps.32.689 10.7498/aps.32.689 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.689 689-696 //www.getgobooth.com/en/article/doi/10.7498/aps.32.697 Author(s): He Yuan-jin, Li Long-tu <br/><p>The electric polarization effect in piezoelectric ceramics of PbZrO3-PbTiO3 system (PZT) was examined by positron lifetime measurements. It was found that the mean lifetime τm increases with the increase of the electric field E. The micromechanism of the increase of τm was discussed, it may be mainly attributed to that the increase of the inner electric field would be energetically in favour of the positrons to form in qPs state. The measurements of the coupling factor K_p, the piezoelectric constant d33, and the dielectric constant ε33T/ε0 were also carried out and the results were compared with that of positron lifetime measurements. It is suggested that there is a possibility to take positrons as a tool for studying the extent of the domain turning and the changes of the energe situation of the electrons during the polarization.A special single sample method was used in the present work. Finally, our method of date analyzing was discussed.</p> <br/>Acta Physica Sinica. 1983 32(6): 697-704. Published 1983-03-05 Author(s): He Yuan-jin, Li Long-tu <br/><p>The electric polarization effect in piezoelectric ceramics of PbZrO3-PbTiO3 system (PZT) was examined by positron lifetime measurements. It was found that the mean lifetime τm increases with the increase of the electric field E. The micromechanism of the increase of τm was discussed, it may be mainly attributed to that the increase of the inner electric field would be energetically in favour of the positrons to form in qPs state. The measurements of the coupling factor K_p, the piezoelectric constant d33, and the dielectric constant ε33T/ε0 were also carried out and the results were compared with that of positron lifetime measurements. It is suggested that there is a possibility to take positrons as a tool for studying the extent of the domain turning and the changes of the energe situation of the electrons during the polarization.A special single sample method was used in the present work. Finally, our method of date analyzing was discussed.</p> <br/>Acta Physica Sinica. 1983 32(6): 697-704. Published 1983-03-05 POSITRON ANNIHILATION STUDY OF ELECTRIC POLARIZA-TION EFFECT IN PIEZOELECTRIC CERAMICS OF PbZrO3-PbTiO3 SYSTEM He Yuan-jin, Li Long-tu 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 697-704. article doi:10.7498/aps.32.697 10.7498/aps.32.697 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.697 697-704 //www.getgobooth.com/en/article/doi/10.7498/aps.32.705 Author(s): Xu Yu-huan, Chen Huan-chu <br/><p>This paper discusses the measuring method and the measuring program of all of the dielectric, elastic and piezoelectric constants of ferroelectric single crystal (K0.20Na0.20Sr0.60Ba0.20)Nb2O6. This crystal was first grown by the authors. All 53 date of the dielectric, elastic and piezoelectric constants and some of the electromechanical coupling factors are published for the first time. Most of these date are measured in accordance with "IRE Standards on Piezoelectric Crystals" except that elastic coefficients S66 and S13 are measured by the thickness shear mode of the (zxl) 45° specimens and the length extensional mode of the (xzt) 45° bars respectively. The measuring accuracies are also discussed.</p> <br/>Acta Physica Sinica. 1983 32(6): 705-712. Published 1983-03-05 Author(s): Xu Yu-huan, Chen Huan-chu <br/><p>This paper discusses the measuring method and the measuring program of all of the dielectric, elastic and piezoelectric constants of ferroelectric single crystal (K0.20Na0.20Sr0.60Ba0.20)Nb2O6. This crystal was first grown by the authors. All 53 date of the dielectric, elastic and piezoelectric constants and some of the electromechanical coupling factors are published for the first time. Most of these date are measured in accordance with "IRE Standards on Piezoelectric Crystals" except that elastic coefficients S66 and S13 are measured by the thickness shear mode of the (zxl) 45° specimens and the length extensional mode of the (xzt) 45° bars respectively. The measuring accuracies are also discussed.</p> <br/>Acta Physica Sinica. 1983 32(6): 705-712. Published 1983-03-05 DETERMINATION OF THE COMPLETE SET OF ELECTROELASTIC CONSTANTS OF FERROELECTRIC CRYSTAL (K0.20Na0.20Sr0.60Ba0.20)Nb2O6 Xu Yu-huan, Chen Huan-chu 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 705-712. article doi:10.7498/aps.32.705 10.7498/aps.32.705 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.705 705-712 //www.getgobooth.com/en/article/doi/10.7498/aps.32.713 Author(s): Gao Zhi, Lu Wen-qiang <br/><p>This paper deals with the propagation of the waves (including relaxation, pressure, and density waves) and thermal mode in nonadiabatic and nonequilibrium gases. Based on the mechanism of thermal disturbance feedback, a new governing equation for the propagation of disturbances and the dispersion relation has been obtained. Some new conclusions are reached. For example, the disturbance is either purely growing or slow-damped which presents a reasonable explanation for abnormal absorptive phenomena of infrasonic sound waves in atmosphere; nonadiabatic characteristic of gas can cause a remarkable dispersion phenomena; the propagation of noise can be damped, etc. In addition, the conclusion that pressure and density waves and thermal mode may be unstable agrees with the experimental fact about, thermal instability in high power laser discharges.</p> <br/>Acta Physica Sinica. 1983 32(6): 713-722. Published 1983-03-05 Author(s): Gao Zhi, Lu Wen-qiang <br/><p>This paper deals with the propagation of the waves (including relaxation, pressure, and density waves) and thermal mode in nonadiabatic and nonequilibrium gases. Based on the mechanism of thermal disturbance feedback, a new governing equation for the propagation of disturbances and the dispersion relation has been obtained. Some new conclusions are reached. For example, the disturbance is either purely growing or slow-damped which presents a reasonable explanation for abnormal absorptive phenomena of infrasonic sound waves in atmosphere; nonadiabatic characteristic of gas can cause a remarkable dispersion phenomena; the propagation of noise can be damped, etc. In addition, the conclusion that pressure and density waves and thermal mode may be unstable agrees with the experimental fact about, thermal instability in high power laser discharges.</p> <br/>Acta Physica Sinica. 1983 32(6): 713-722. Published 1983-03-05 ON WAVES IN NONADIABATIC AND NONEQUILIBRIUM GASES Gao Zhi, Lu Wen-qiang 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 713-722. article doi:10.7498/aps.32.713 10.7498/aps.32.713 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.713 713-722 //www.getgobooth.com/en/article/doi/10.7498/aps.32.723 Author(s): Zhang Chun-pin, Zhang Guang-yin, Lü Ke-cheng, Ba En-xu, Liu Zhi-guo <br/><p>This paper presents experimental observations and the cause for removal of laser mode degeneracy. Frequency difference between degenerate laser modes were analyzed and calculated in detail. Graphical plot of frequency difference between degenerate laser modes after removing degeneracy versus cavity detuning is given.</p> <br/>Acta Physica Sinica. 1983 32(6): 723-729. Published 1983-03-05 Author(s): Zhang Chun-pin, Zhang Guang-yin, Lü Ke-cheng, Ba En-xu, Liu Zhi-guo <br/><p>This paper presents experimental observations and the cause for removal of laser mode degeneracy. Frequency difference between degenerate laser modes were analyzed and calculated in detail. Graphical plot of frequency difference between degenerate laser modes after removing degeneracy versus cavity detuning is given.</p> <br/>Acta Physica Sinica. 1983 32(6): 723-729. Published 1983-03-05 REMOVAL OF LASER MODE DEGENERACY AND THEORETICAL ANALYSIS OF THEIR FREQU-ENCY DIFFERENCE Zhang Chun-pin, Zhang Guang-yin, Lü Ke-cheng, Ba En-xu, Liu Zhi-guo 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 723-729. article doi:10.7498/aps.32.723 10.7498/aps.32.723 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.723 723-729 //www.getgobooth.com/en/article/doi/10.7498/aps.32.730 Author(s): Bao Ke-da <br/><p>In order to discuss the transport phenomena in dense gases, a generalized Enskog's equation is suggested. We notice that the correlation function Y(r) can be obtained from virial expansion of the equation of state.In this paper, formulas for calculating viscosity and thermal conductivity for dense gases of molecules interacting with a square-well potential are derived. Using these formulas, we have calculated the viscosity for argon at temperatures 173 K and 348 K and the thermal conductivity for argon at temperatures 183 K and 348 K. Comparison of theoretical results with the experimental measurements shows that the agreement is good and is better than another theoretical calculations made so far.</p> <br/>Acta Physica Sinica. 1983 32(6): 730-749. Published 1983-03-05 Author(s): Bao Ke-da <br/><p>In order to discuss the transport phenomena in dense gases, a generalized Enskog's equation is suggested. We notice that the correlation function Y(r) can be obtained from virial expansion of the equation of state.In this paper, formulas for calculating viscosity and thermal conductivity for dense gases of molecules interacting with a square-well potential are derived. Using these formulas, we have calculated the viscosity for argon at temperatures 173 K and 348 K and the thermal conductivity for argon at temperatures 183 K and 348 K. Comparison of theoretical results with the experimental measurements shows that the agreement is good and is better than another theoretical calculations made so far.</p> <br/>Acta Physica Sinica. 1983 32(6): 730-749. Published 1983-03-05 TRANSPORT PHENOMENA IN DENSE GASES AND VISCO-SITY,THERMAL CONDUCTIVITY FOR ARGON OF MOLECULES INTERACTING WITH A SQUARE-WELL POTENTIAL Bao Ke-da 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 730-749. article doi:10.7498/aps.32.730 10.7498/aps.32.730 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.730 730-749 //www.getgobooth.com/en/article/doi/10.7498/aps.32.750 Author(s): Zhang Cheng, Huo Yu-ping <br/><p>In this article, the critical behavior of birth-death equation for trimolecular reactionmodel has been discussed. If 1+k3A23D1)/D2)1/2]2, it is just the critical behaviorof the trimolecular model itself. The amplitudes of the unstable fluctuation waves have been taken as order parameters describing the change of fluctuation distribution near the critical point (B=Bm). By using the renormalization method to evade the difficulty due to the divergence of the fluctuation of steady solution at Bm, we obtain the generalized Landau-Ginzburg equations for the amplitudes of average values and fluctuation of partical numbers.The analytical and numerical analysis show that, as B increases beyond Bm, the variance also has a periodical stable part, the amplitude of which is very large and determined mainly by the saturated amplitudes of average particle numbers.</p> <br/>Acta Physica Sinica. 1983 32(6): 750-761. Published 1983-03-05 Author(s): Zhang Cheng, Huo Yu-ping <br/><p>In this article, the critical behavior of birth-death equation for trimolecular reactionmodel has been discussed. If 1+k3A23D1)/D2)1/2]2, it is just the critical behaviorof the trimolecular model itself. The amplitudes of the unstable fluctuation waves have been taken as order parameters describing the change of fluctuation distribution near the critical point (B=Bm). By using the renormalization method to evade the difficulty due to the divergence of the fluctuation of steady solution at Bm, we obtain the generalized Landau-Ginzburg equations for the amplitudes of average values and fluctuation of partical numbers.The analytical and numerical analysis show that, as B increases beyond Bm, the variance also has a periodical stable part, the amplitude of which is very large and determined mainly by the saturated amplitudes of average particle numbers.</p> <br/>Acta Physica Sinica. 1983 32(6): 750-761. Published 1983-03-05 THE CRITICAL BEHAVIOR OF THE FLUCTUATION IN TRIMOLECULAR REACTION MODELX Zhang Cheng, Huo Yu-ping 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 750-761. article doi:10.7498/aps.32.750 10.7498/aps.32.750 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.750 750-761 //www.getgobooth.com/en/article/doi/10.7498/aps.32.762 Author(s): Ximen Ji-ye, Yan Ji-wen <br/><p>The problem of phase retrieval from image and diffraction patterns is of importance in electron microscopy. In this paper the true phase can be extracted uniquely and accurately by Gerchberg-Saxton iterative algorithm for the wave function, its amplitude being unity or a linear function, while its phase being a parabolic, sinuous or exponential function.A computer program for retrieving the phase has been worked out. As an image wave function is given, its Fourier transform may be calculated by the discrete fast Fourier transform algorithm. So we can recover the phase with G-S algorithm, using a random initial phase between -π and +π. The numerical examples are given in detail. The phase retrieval solution is stable under fluctuation of input initial phase up to 1 rad.</p> <br/>Acta Physica Sinica. 1983 32(6): 762-769. Published 1983-03-05 Author(s): Ximen Ji-ye, Yan Ji-wen <br/><p>The problem of phase retrieval from image and diffraction patterns is of importance in electron microscopy. In this paper the true phase can be extracted uniquely and accurately by Gerchberg-Saxton iterative algorithm for the wave function, its amplitude being unity or a linear function, while its phase being a parabolic, sinuous or exponential function.A computer program for retrieving the phase has been worked out. As an image wave function is given, its Fourier transform may be calculated by the discrete fast Fourier transform algorithm. So we can recover the phase with G-S algorithm, using a random initial phase between -π and +π. The numerical examples are given in detail. The phase retrieval solution is stable under fluctuation of input initial phase up to 1 rad.</p> <br/>Acta Physica Sinica. 1983 32(6): 762-769. Published 1983-03-05 COMPUTATIONAL TRIALS FOR PHASE RETRIEVAL IN ELECTRON MICROSCOPY FROM IMAGE AND DIFFRACTION PATTERNS Ximen Ji-ye, Yan Ji-wen 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 762-769. article doi:10.7498/aps.32.762 10.7498/aps.32.762 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.762 762-769 //www.getgobooth.com/en/article/doi/10.7498/aps.32.770 Author(s): Dun Ming-qian, Yang Gui-lin, Xu You, Zhai Hong-ru <br/><p>Based on the consideration that the effective Hamiltonian matrix determining the zero field splitting parameter a of S-state ion in cubic crystal field possesses the same property with that of spin Hamiltonian matrix, a simple relation between parameter aand the non-diagonal elemente C of the effective Hamiltonian matrix in L-S representa-tion was derived as a=2/51/2C.As an example, the value of a of Mn2+ ion in CaO crystalwas calculated by using this relation, and the result agrees well with the experimental value.</p> <br/>Acta Physica Sinica. 1983 32(6): 770-779. Published 1983-03-05 Author(s): Dun Ming-qian, Yang Gui-lin, Xu You, Zhai Hong-ru <br/><p>Based on the consideration that the effective Hamiltonian matrix determining the zero field splitting parameter a of S-state ion in cubic crystal field possesses the same property with that of spin Hamiltonian matrix, a simple relation between parameter aand the non-diagonal elemente C of the effective Hamiltonian matrix in L-S representa-tion was derived as a=2/51/2C.As an example, the value of a of Mn2+ ion in CaO crystalwas calculated by using this relation, and the result agrees well with the experimental value.</p> <br/>Acta Physica Sinica. 1983 32(6): 770-779. Published 1983-03-05 METHOD OF CALCULATING ZERO FIELD SPLITTING PARAMETER α OF S-STATE ION Dun Ming-qian, Yang Gui-lin, Xu You, Zhai Hong-ru 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 770-779. article doi:10.7498/aps.32.770 10.7498/aps.32.770 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.770 770-779 //www.getgobooth.com/en/article/doi/10.7498/aps.32.780 Author(s): Wang Yong-ling, Yuan Wan-zong, He Guo-rong, Lin Sheng-wei, Ling Rong-hua, Qu Cui-feng <br/><p>The phase transition properties of Nb doped PZT 95/5 type ferroelectric ceramics under the action of shock wave in "normal mode" condition have been investigated. Under the condition of parallel inductance-capacitance load, the maximum current 1360A has been obtained. Under the condition of resistance load, the maximum voltage 145×103 V was obtained. These results are in good agreement with theory.</p> <br/>Acta Physica Sinica. 1983 32(6): 780-785. Published 1983-03-05 Author(s): Wang Yong-ling, Yuan Wan-zong, He Guo-rong, Lin Sheng-wei, Ling Rong-hua, Qu Cui-feng <br/><p>The phase transition properties of Nb doped PZT 95/5 type ferroelectric ceramics under the action of shock wave in "normal mode" condition have been investigated. Under the condition of parallel inductance-capacitance load, the maximum current 1360A has been obtained. Under the condition of resistance load, the maximum voltage 145×103 V was obtained. These results are in good agreement with theory.</p> <br/>Acta Physica Sinica. 1983 32(6): 780-785. Published 1983-03-05 STUDY ON SHOCK WAVE-EXPLOSIVE ENERGY CONVERTION OF FERROELECTRICS Wang Yong-ling, Yuan Wan-zong, He Guo-rong, Lin Sheng-wei, Ling Rong-hua, Qu Cui-feng 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 780-785. article doi:10.7498/aps.32.780 10.7498/aps.32.780 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.780 780-785 //www.getgobooth.com/en/article/doi/10.7498/aps.32.786 Author(s): Liu Jian-cheng, Li De-yu <br/><p>A single-crystal X-ray diffraction analysis has been performed on LiErP4O12 Synthesized by the flux method. The crystal belongs to monoclinic system with space group C2/c, z=4, and cell parameters α=16.229?, b=7.009?, c=9.524? and β=125.92°. A full-matrix least square refinement with secondary extinction as a structure parameter gave R=0.058 for 1282 independent reflections. The basic structural units are helical ribbons, (PO3)n, formed by corner-sharing tetraheclra of PO4. The ErO8 dodecahedra are isolated from each other in the sense that they do not share any O atoms.</p> <br/>Acta Physica Sinica. 1983 32(6): 786-790. Published 1983-03-05 Author(s): Liu Jian-cheng, Li De-yu <br/><p>A single-crystal X-ray diffraction analysis has been performed on LiErP4O12 Synthesized by the flux method. The crystal belongs to monoclinic system with space group C2/c, z=4, and cell parameters α=16.229?, b=7.009?, c=9.524? and β=125.92°. A full-matrix least square refinement with secondary extinction as a structure parameter gave R=0.058 for 1282 independent reflections. The basic structural units are helical ribbons, (PO3)n, formed by corner-sharing tetraheclra of PO4. The ErO8 dodecahedra are isolated from each other in the sense that they do not share any O atoms.</p> <br/>Acta Physica Sinica. 1983 32(6): 786-790. Published 1983-03-05 CRYSTAL STRUCTURE OF LiErP4O12 Liu Jian-cheng, Li De-yu 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 786-790. article doi:10.7498/aps.32.786 10.7498/aps.32.786 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.786 786-790 //www.getgobooth.com/en/article/doi/10.7498/aps.32.791 Author(s): Jia Shou-quan, Jiang Pei-zhi, Fan Xian-he, Niu Hong-da, Li De-zhen <br/><p>We investigated preliminarilly the synthesis and crystallization in the system TeO2-K3PO4-H2O under hydrothermal conditions. It was found that in addition to the crystals of TeO2, crystals of a new phase which we called γ could be obtained in the given range of constituent and growth conditions. The γ crystal belongs to trigonal system with α= b=10.734 ?, c=21.041?, α=β=90°, γ=120°. The formula of γ is K2Te4O9·3H2O. Furthermore,it was shown that the crystallized product in the crystallization zone depends mainly on the molar ratio of starting materials k=TeO2/K3PO4 in the system. When k≤1.90, the crystallized phase only consists of γ crystals, k≥2.22, only TeO2 crystals appears, while 1.902 are present together.Finally, the DTA curve and the relative intensities and corresponding d-values of X-ray powder diffraction pattern of γ-phase are also given.</p> <br/>Acta Physica Sinica. 1983 32(6): 791-794. Published 1983-03-05 Author(s): Jia Shou-quan, Jiang Pei-zhi, Fan Xian-he, Niu Hong-da, Li De-zhen <br/><p>We investigated preliminarilly the synthesis and crystallization in the system TeO2-K3PO4-H2O under hydrothermal conditions. It was found that in addition to the crystals of TeO2, crystals of a new phase which we called γ could be obtained in the given range of constituent and growth conditions. The γ crystal belongs to trigonal system with α= b=10.734 ?, c=21.041?, α=β=90°, γ=120°. The formula of γ is K2Te4O9·3H2O. Furthermore,it was shown that the crystallized product in the crystallization zone depends mainly on the molar ratio of starting materials k=TeO2/K3PO4 in the system. When k≤1.90, the crystallized phase only consists of γ crystals, k≥2.22, only TeO2 crystals appears, while 1.902 are present together.Finally, the DTA curve and the relative intensities and corresponding d-values of X-ray powder diffraction pattern of γ-phase are also given.</p> <br/>Acta Physica Sinica. 1983 32(6): 791-794. Published 1983-03-05 SYNTHESIS AND CRYSTALLIZATION OF A NEW COMPOUND K2Te4O9·3H2O IN THE TeO2-K3PO4-H2O SYSTEM UNDER HYDROTHERMAL CONDITIONS Jia Shou-quan, Jiang Pei-zhi, Fan Xian-he, Niu Hong-da, Li De-zhen 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 791-794. article doi:10.7498/aps.32.791 10.7498/aps.32.791 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.791 791-794 //www.getgobooth.com/en/article/doi/10.7498/aps.32.795 Author(s): Zhong Ji-guo, Xu Guan-feng, Wang Ting-fu, Zhang Chun-yu, Lü Yu-cai, Lü Chang-qing, Chen Jia-rong <br/><p>By determining the relations between the effective distribution coefficient of MgO in the congruent LiNbO3 and the phase-matching temperature and the concentration of MgO, chemical composition which makes the Mg :LiNbO3 to get the highest phase-matching temperature has been found. The problems frequently encountered in heavily doped Mg:LiNbO3 crystal growth, such as growth striations and precipitation etc, have been resolved.The Mg:LiNbO3 crystals with high resistance to light-induced refractive index changes and good optical quality have been grown. Using the crystals for frequency doubling of a continuously pumped acousto-optical Q-switch Nd :YAG laser, second harmonic output with the highest avarage power of 2W have been obtained.</p> <br/>Acta Physica Sinica. 1983 32(6): 795-798. Published 1983-03-05 Author(s): Zhong Ji-guo, Xu Guan-feng, Wang Ting-fu, Zhang Chun-yu, Lü Yu-cai, Lü Chang-qing, Chen Jia-rong <br/><p>By determining the relations between the effective distribution coefficient of MgO in the congruent LiNbO3 and the phase-matching temperature and the concentration of MgO, chemical composition which makes the Mg :LiNbO3 to get the highest phase-matching temperature has been found. The problems frequently encountered in heavily doped Mg:LiNbO3 crystal growth, such as growth striations and precipitation etc, have been resolved.The Mg:LiNbO3 crystals with high resistance to light-induced refractive index changes and good optical quality have been grown. Using the crystals for frequency doubling of a continuously pumped acousto-optical Q-switch Nd :YAG laser, second harmonic output with the highest avarage power of 2W have been obtained.</p> <br/>Acta Physica Sinica. 1983 32(6): 795-798. Published 1983-03-05 THE GROWTH AND THE FREQUENCY DOUBLING CHARACTERS OF HEAVILY DOPED Mg:LiNbO3 CRYSTALS Zhong Ji-guo, Xu Guan-feng, Wang Ting-fu, Zhang Chun-yu, Lü Yu-cai, Lü Chang-qing, Chen Jia-rong 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 795-798. article doi:10.7498/aps.32.795 10.7498/aps.32.795 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.795 795-798 //www.getgobooth.com/en/article/doi/10.7498/aps.32.799 Author(s): Yu Ming-ren, Yang Guang, Wang Xun <br/><p>The atomic concentration ratio of In to P on InP(100) surfaces has been determined to an accuracy of 20% by measuring the In 3d5/2 and P 2p XPS intensities and using the corresponding atomic sensitivity factor values previously derived by the authors. The experimental results show that there exists a preferential sputtering effect for the argon ion bombardment. The In to P concentration ratio reaches a value of 2.2 at 1 keV ion beam energy and increases monotonically with the ion energy. After annealing the sample at approximate 300℃ in ultra high vacuum for 30 minutes, the In to P ratio at the surface decreases to 1.2 which is quite closed to the value of bulk stoichiometric ratio. It can be deduced from the angular dependence of the XPS intensities and the chemical shift of In 3d5/2 binding energy that after the heat treatment, the In-P chemical bonds which were broken by the ion bombarding could reconnect, and the surface atomic arrangement was thus led to become an ordered structure with an outmost atomic layer rich in In.</p> <br/>Acta Physica Sinica. 1983 32(6): 799-802. Published 1983-03-05 Author(s): Yu Ming-ren, Yang Guang, Wang Xun <br/><p>The atomic concentration ratio of In to P on InP(100) surfaces has been determined to an accuracy of 20% by measuring the In 3d5/2 and P 2p XPS intensities and using the corresponding atomic sensitivity factor values previously derived by the authors. The experimental results show that there exists a preferential sputtering effect for the argon ion bombardment. The In to P concentration ratio reaches a value of 2.2 at 1 keV ion beam energy and increases monotonically with the ion energy. After annealing the sample at approximate 300℃ in ultra high vacuum for 30 minutes, the In to P ratio at the surface decreases to 1.2 which is quite closed to the value of bulk stoichiometric ratio. It can be deduced from the angular dependence of the XPS intensities and the chemical shift of In 3d5/2 binding energy that after the heat treatment, the In-P chemical bonds which were broken by the ion bombarding could reconnect, and the surface atomic arrangement was thus led to become an ordered structure with an outmost atomic layer rich in In.</p> <br/>Acta Physica Sinica. 1983 32(6): 799-802. Published 1983-03-05 DETERMINATION OF THE ATOMIC CONCENTRATION RATIO ON InP (100) CLEAN SURFACES BY X-RAY PHOTOELECTRON SPECTROSCOPY Yu Ming-ren, Yang Guang, Wang Xun 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 799-802. article doi:10.7498/aps.32.799 10.7498/aps.32.799 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.799 799-802 //www.getgobooth.com/en/article/doi/10.7498/aps.32.803 Author(s): Chen Guang-hua, Zhang Fang-qing, Xu Xi-xiang <br/><p>XPS analyses of the GD-a-SixC1-x:H samples have been made, the results are similar to those of katayama. In this paper, the chemical shifts of Si2p and Cls levels, the observed valence-electron plasmon energy hωp and the atomic density of our samples with various alloy composition x are presented. The results are discussed preliminarily.</p> <br/>Acta Physica Sinica. 1983 32(6): 803-807. Published 1983-03-05 Author(s): Chen Guang-hua, Zhang Fang-qing, Xu Xi-xiang <br/><p>XPS analyses of the GD-a-SixC1-x:H samples have been made, the results are similar to those of katayama. In this paper, the chemical shifts of Si2p and Cls levels, the observed valence-electron plasmon energy hωp and the atomic density of our samples with various alloy composition x are presented. The results are discussed preliminarily.</p> <br/>Acta Physica Sinica. 1983 32(6): 803-807. Published 1983-03-05 BEHAVIOR OF PLASMONS IN GD-a-SixC1-x:H SAMPLES STUDIED BY XPS Chen Guang-hua, Zhang Fang-qing, Xu Xi-xiang 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 803-807. article doi:10.7498/aps.32.803 10.7498/aps.32.803 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.803 803-807 //www.getgobooth.com/en/article/doi/10.7498/aps.32.808 Author(s): Kang Zhen-chuan <br/><p>The surface of synthetic diamond have been observed employing reflection electron microscopy with both TBM and STEM instrument. It is found that there are slip steps of screw dislocations, growth steps and microcrystals on the surface. The result shows that the surface of sythetie diamonds is characteristic of crystallization from solution.</p> <br/>Acta Physica Sinica. 1983 32(6): 808-811. Published 1983-03-05 Author(s): Kang Zhen-chuan <br/><p>The surface of synthetic diamond have been observed employing reflection electron microscopy with both TBM and STEM instrument. It is found that there are slip steps of screw dislocations, growth steps and microcrystals on the surface. The result shows that the surface of sythetie diamonds is characteristic of crystallization from solution.</p> <br/>Acta Physica Sinica. 1983 32(6): 808-811. Published 1983-03-05 A STUDY OF SYNTHETIC DIAMOND SURFACE USING REFLECTION ELECTRON MICROSCOPY Kang Zhen-chuan 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 808-811. article doi:10.7498/aps.32.808 10.7498/aps.32.808 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.808 808-811 //www.getgobooth.com/en/article/doi/10.7498/aps.32.812 Author(s): Luo He-lie, Wen Yi-ting, Sun Ke, Feng Yuan-bing, Huang Xi-cheng <br/><p>Fine γ-Fe2O3 particles with diameter of 80-700? were prepared. Their saturation magnetization per unit mass σs and specific surface area Sa were measured. An empirical formula σs(s) = σs(∞(1-aSa) was obtained. It was proposed that the fine particles consist of two parts: the first part is the surface layer, whose magnetic moment can not be turned entirely to the field direction by the applied magnetic field, but make an average angle (canting angle) with the field. The second is the inner part of the particles, whose magnetic moment can be aligned along the direction of the applied magnetic field. The above empirical formula can be interpreted very well by this simple model.</p> <br/>Acta Physica Sinica. 1983 32(6): 812-818. Published 1983-03-05 Author(s): Luo He-lie, Wen Yi-ting, Sun Ke, Feng Yuan-bing, Huang Xi-cheng <br/><p>Fine γ-Fe2O3 particles with diameter of 80-700? were prepared. Their saturation magnetization per unit mass σs and specific surface area Sa were measured. An empirical formula σs(s) = σs(∞(1-aSa) was obtained. It was proposed that the fine particles consist of two parts: the first part is the surface layer, whose magnetic moment can not be turned entirely to the field direction by the applied magnetic field, but make an average angle (canting angle) with the field. The second is the inner part of the particles, whose magnetic moment can be aligned along the direction of the applied magnetic field. The above empirical formula can be interpreted very well by this simple model.</p> <br/>Acta Physica Sinica. 1983 32(6): 812-818. Published 1983-03-05 SURFACE EFFECTS ON SATURATION MAGNETIZATION OF FINE γ-Fe2O3 PARTICLES Luo He-lie, Wen Yi-ting, Sun Ke, Feng Yuan-bing, Huang Xi-cheng 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 812-818. article doi:10.7498/aps.32.812 10.7498/aps.32.812 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.812 812-818 //www.getgobooth.com/en/article/doi/10.7498/aps.32.819 Author(s): Tao Rui-bao, Yu En-xi, Lu Jian-hua, Chen Zhe <br/><p>By calculating the minimum of thermodynamic potential in Landau's theory of second order phase transition, the direction of second order structural phase transition at Γ point of Ohn space groups are obtained. "Maximal subgroup" condition is discussed.</p> <br/>Acta Physica Sinica. 1983 32(6): 819-822. Published 1983-03-05 Author(s): Tao Rui-bao, Yu En-xi, Lu Jian-hua, Chen Zhe <br/><p>By calculating the minimum of thermodynamic potential in Landau's theory of second order phase transition, the direction of second order structural phase transition at Γ point of Ohn space groups are obtained. "Maximal subgroup" condition is discussed.</p> <br/>Acta Physica Sinica. 1983 32(6): 819-822. Published 1983-03-05 DIRECTION OF SECOND ORDER STRUCTURAL PHASE TRANSITION AT г POINT OF hn SPACE GROUPS Tao Rui-bao, Yu En-xi, Lu Jian-hua, Chen Zhe 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 819-822. article doi:10.7498/aps.32.819 10.7498/aps.32.819 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.819 819-822 //www.getgobooth.com/en/article/doi/10.7498/aps.32.823 Author(s): Zhang Shi-wei <br/><p>In this paper, the two-component Dirac equation in Schwarzschild background space time is reduced to a one component second order equation. The effective potential and the L-S coupling term are given. Near the horizon, there is a potential wall. When K2&lt;3η2, there is another potential well by the wall. So the particle resonating in the well will be absorbed by the horizon after penetrating through the wall. With WKB approximation, the resonance spectrum and its width are obtained. For the case of Re-issner-Nordstrom background space time, the same procedure is also carried out, and the results are discussed briefly.</p> <br/>Acta Physica Sinica. 1983 32(6): 823-828. Published 1983-03-05 Author(s): Zhang Shi-wei <br/><p>In this paper, the two-component Dirac equation in Schwarzschild background space time is reduced to a one component second order equation. The effective potential and the L-S coupling term are given. Near the horizon, there is a potential wall. When K2&lt;3η2, there is another potential well by the wall. So the particle resonating in the well will be absorbed by the horizon after penetrating through the wall. With WKB approximation, the resonance spectrum and its width are obtained. For the case of Re-issner-Nordstrom background space time, the same procedure is also carried out, and the results are discussed briefly.</p> <br/>Acta Physica Sinica. 1983 32(6): 823-828. Published 1983-03-05 THE QUASI BOUND STATES OF DIRAC FERMION IN SCHWARZSCHILD METRIC Zhang Shi-wei 1983-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1983 32(6): 823-828. article doi:10.7498/aps.32.823 10.7498/aps.32.823 Acta Physica Sinica 32 6 1983-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.32.823 823-828

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