//www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:37 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:37 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.40.505 Author(s): WANG SHI-KUN, WANG ZHONG-HUA, WU KE, GUO HAN-YING <br/><p>In terms of the theory of nonlinear connection, we proposed the concept of Beltrami connection in two dimension space, and discussed the symmety of Polyakov's two dimension gravty.</p> <br/>Acta Physica Sinica. 1991 40(4): 505-512. Published 1991-02-05 Author(s): WANG SHI-KUN, WANG ZHONG-HUA, WU KE, GUO HAN-YING <br/><p>In terms of the theory of nonlinear connection, we proposed the concept of Beltrami connection in two dimension space, and discussed the symmety of Polyakov's two dimension gravty.</p> <br/>Acta Physica Sinica. 1991 40(4): 505-512. Published 1991-02-05 NONLINEAR CONNECTION, BELTRAMI CONNECTION AND TWO-DIMENSION GRAVITY WANG SHI-KUN, WANG ZHONG-HUA, WU KE, GUO HAN-YING 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 505-512. article doi:10.7498/aps.40.505 10.7498/aps.40.505 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.505 505-512 //www.getgobooth.com/en/article/doi/10.7498/aps.40.513 Author(s): CHEN DE-FANG, LOU SEN-YUE <br/><p>By means of some limiting procedures, the solutions of a complex nonlinear equation with many parameters could degenerate into the solutions of a simple equation with less parameters. In this paper, taking KdV equation and high order KdV equations as example, we analyse the possibility of the inverse procedure of the limiting process mentioned above. The results show that deforming a solution of a simple equation into that of the. complex equations is possible. However, this inverse procedure is not unique in general.</p> <br/>Acta Physica Sinica. 1991 40(4): 513-521. Published 1991-02-05 Author(s): CHEN DE-FANG, LOU SEN-YUE <br/><p>By means of some limiting procedures, the solutions of a complex nonlinear equation with many parameters could degenerate into the solutions of a simple equation with less parameters. In this paper, taking KdV equation and high order KdV equations as example, we analyse the possibility of the inverse procedure of the limiting process mentioned above. The results show that deforming a solution of a simple equation into that of the. complex equations is possible. However, this inverse procedure is not unique in general.</p> <br/>Acta Physica Sinica. 1991 40(4): 513-521. Published 1991-02-05 DEFORMATION THEORY AMONG TRAVELLING WAVE SOLUTIONS OF KdV EQUATION AND HIGH ORDER KdV EQUATIONS CHEN DE-FANG, LOU SEN-YUE 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 513-521. article doi:10.7498/aps.40.513 10.7498/aps.40.513 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.513 513-521 //www.getgobooth.com/en/article/doi/10.7498/aps.40.522 Author(s): CHENG HUAN-SHENG, YANG FU-JIA, LI XIANG-YANG <br/><p>We describe a new technique for MeV heavy-ion backscattering analysis of trace heavy elements on the surface and near surface. Pulse pileup problems are eliminated by choice of incidence ion mass M1, which is the same as or larger then that of bulk atom M2. Using 3 MeV Si beam, we could measure quantities of arsenic implanted in silicon down to 2×1012 atoms/cm2. Experimental results also show that sensitivity for impurity element on silicon substrate is as high as 2.2 ×109 atoms/cm2 for Au.</p> <br/>Acta Physica Sinica. 1991 40(4): 522-526. Published 1991-02-05 Author(s): CHENG HUAN-SHENG, YANG FU-JIA, LI XIANG-YANG <br/><p>We describe a new technique for MeV heavy-ion backscattering analysis of trace heavy elements on the surface and near surface. Pulse pileup problems are eliminated by choice of incidence ion mass M1, which is the same as or larger then that of bulk atom M2. Using 3 MeV Si beam, we could measure quantities of arsenic implanted in silicon down to 2×1012 atoms/cm2. Experimental results also show that sensitivity for impurity element on silicon substrate is as high as 2.2 ×109 atoms/cm2 for Au.</p> <br/>Acta Physica Sinica. 1991 40(4): 522-526. Published 1991-02-05 HEAVY-ION BACKSCATTERING——A NEW METHOD FOR DETERMINATION OF TRACE HEAVY ELEMENTS ON THE SURFACE AND NEAR SURFACE CHENG HUAN-SHENG, YANG FU-JIA, LI XIANG-YANG 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 522-526. article doi:10.7498/aps.40.522 10.7498/aps.40.522 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.522 522-526 //www.getgobooth.com/en/article/doi/10.7498/aps.40.527 Author(s): LIU HONG, CHEN AI-QIU, LI BAI-WEN <br/><p>On the basis of impulse approximate method, an analytical wavefuction based on a potential model was used to calculate the l-mixing transition cross section of Rydberg state Na atom in thermal collision with He, Ne and Ar, the results for Na-He are better than that of other methods ever used.</p> <br/>Acta Physica Sinica. 1991 40(4): 527-532. Published 1991-02-05 Author(s): LIU HONG, CHEN AI-QIU, LI BAI-WEN <br/><p>On the basis of impulse approximate method, an analytical wavefuction based on a potential model was used to calculate the l-mixing transition cross section of Rydberg state Na atom in thermal collision with He, Ne and Ar, the results for Na-He are better than that of other methods ever used.</p> <br/>Acta Physica Sinica. 1991 40(4): 527-532. Published 1991-02-05 CALCULATION OF l-MIXING CROSS SECTION IN THERMAL COLLISION OF RYDBERG STATE Na ATOM WITH RARE GAS LIU HONG, CHEN AI-QIU, LI BAI-WEN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 527-532. article doi:10.7498/aps.40.527 10.7498/aps.40.527 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.527 527-532 //www.getgobooth.com/en/article/doi/10.7498/aps.40.533 Author(s): HUANG HONG-BIN <br/><p>In this paper, we introduce the binomial state of a two-level atomic system, which is a state that yields a binomial probability distribution. Its generation, squeezing, antibunching, and subpoisson statistics are discussed. It reduces to the Glauber coherent state in certain limit, and in that limit, the binomial distribution reduces to the Poisson distribution. This limiting process destroys all nonclassical effects of the system. The Bloch vector model is used to discuss the quantum characters of mixed state of one atom. Finally, the binomial state of the atomic system and the binomial state of the Bose system is compared. It is shown that the binomial state of a Bose system can not be produced in a atomic system.</p> <br/>Acta Physica Sinica. 1991 40(4): 533-540. Published 1991-02-05 Author(s): HUANG HONG-BIN <br/><p>In this paper, we introduce the binomial state of a two-level atomic system, which is a state that yields a binomial probability distribution. Its generation, squeezing, antibunching, and subpoisson statistics are discussed. It reduces to the Glauber coherent state in certain limit, and in that limit, the binomial distribution reduces to the Poisson distribution. This limiting process destroys all nonclassical effects of the system. The Bloch vector model is used to discuss the quantum characters of mixed state of one atom. Finally, the binomial state of the atomic system and the binomial state of the Bose system is compared. It is shown that the binomial state of a Bose system can not be produced in a atomic system.</p> <br/>Acta Physica Sinica. 1991 40(4): 533-540. Published 1991-02-05 BINOMIAL STATES OF THE TWO-LEVEL ATOMIC SYSTEM HUANG HONG-BIN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 533-540. article doi:10.7498/aps.40.533 10.7498/aps.40.533 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.533 533-540 //www.getgobooth.com/en/article/doi/10.7498/aps.40.541 Author(s): FANG YAN, FU SHI-YOU, ZHANG PENG-XIANG, YU YONG-CHENG <br/><p>The abnormal changes in SERS of salicylic acid adsorbed on colloidal silver caused by adding KC1 are reported in this article. It was found that the SERS of some vibrational modes corresponsing to certain structures in salicylic acid were reduced rapidly. However, only the SERS intensity of v(-OH) vibration near 3436cm-1 incresed further because of KC1 addition. Also the influence of adding KC1 on SERS signals of a series of molecules including -COOH structure such as p-aminobenzoic acid, benzoic acid etc., were investigated. It was shown that Cl- could obviously weaken the SERS intensity of those molecules adsorbed on silver colloid. Both the phenomena have been discussed, and were compared with the case of pyriline. The results of transmission electron micriscopy observation and UV-visible spectral. experiments showed the agreement with the above conclusion.</p> <br/>Acta Physica Sinica. 1991 40(4): 541-546. Published 1991-02-05 Author(s): FANG YAN, FU SHI-YOU, ZHANG PENG-XIANG, YU YONG-CHENG <br/><p>The abnormal changes in SERS of salicylic acid adsorbed on colloidal silver caused by adding KC1 are reported in this article. It was found that the SERS of some vibrational modes corresponsing to certain structures in salicylic acid were reduced rapidly. However, only the SERS intensity of v(-OH) vibration near 3436cm-1 incresed further because of KC1 addition. Also the influence of adding KC1 on SERS signals of a series of molecules including -COOH structure such as p-aminobenzoic acid, benzoic acid etc., were investigated. It was shown that Cl- could obviously weaken the SERS intensity of those molecules adsorbed on silver colloid. Both the phenomena have been discussed, and were compared with the case of pyriline. The results of transmission electron micriscopy observation and UV-visible spectral. experiments showed the agreement with the above conclusion.</p> <br/>Acta Physica Sinica. 1991 40(4): 541-546. Published 1991-02-05 ABNORMAL CHANGES IN SERS OF SALICYLIC ACID ADSORBED ON COLLOIDAL SILVER AFTER ADDING KC1 FANG YAN, FU SHI-YOU, ZHANG PENG-XIANG, YU YONG-CHENG 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 541-546. article doi:10.7498/aps.40.541 10.7498/aps.40.541 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.541 541-546 //www.getgobooth.com/en/article/doi/10.7498/aps.40.547 Author(s): WANG JI-SUO <br/><p>Based on the reference [1] , the mathematical and quantum statistical properties of the orthonormalized eigenstates of operator αk (k=3) are studied in this paper. It is found that all the orthonormalized eigenstates have nonclassical effects and they form a nonclassical complete representation. The result given by the reference [1] in the case k = 3 is only a special instance of the general conclusion of ours.</p> <br/>Acta Physica Sinica. 1991 40(4): 547-554. Published 1991-02-05 Author(s): WANG JI-SUO <br/><p>Based on the reference [1] , the mathematical and quantum statistical properties of the orthonormalized eigenstates of operator αk (k=3) are studied in this paper. It is found that all the orthonormalized eigenstates have nonclassical effects and they form a nonclassical complete representation. The result given by the reference [1] in the case k = 3 is only a special instance of the general conclusion of ours.</p> <br/>Acta Physica Sinica. 1991 40(4): 547-554. Published 1991-02-05 MATHEMATICAL STRUCTURE OF THE EIGENSTATES OF OPERATOR ak AND THEIR PROPERTIES WANG JI-SUO 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 547-554. article doi:10.7498/aps.40.547 10.7498/aps.40.547 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.547 547-554 //www.getgobooth.com/en/article/doi/10.7498/aps.40.555 Author(s): TAN WEI-HAN, LIU REN-HONG <br/><p>A model is presented for the transmission spectra calculation of an atom-cavity. The three peaks structure of the spectra obtained can be regarded as the result of vacuum Rabi oscillation.</p> <br/>Acta Physica Sinica. 1991 40(4): 555-559. Published 1991-02-05 Author(s): TAN WEI-HAN, LIU REN-HONG <br/><p>A model is presented for the transmission spectra calculation of an atom-cavity. The three peaks structure of the spectra obtained can be regarded as the result of vacuum Rabi oscillation.</p> <br/>Acta Physica Sinica. 1991 40(4): 555-559. Published 1991-02-05 TRANSMISSION SPECTRA OF AN ATOM-CAVITY TAN WEI-HAN, LIU REN-HONG 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 555-559. article doi:10.7498/aps.40.555 10.7498/aps.40.555 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.555 555-559 //www.getgobooth.com/en/article/doi/10.7498/aps.40.560 Author(s): HU KAI-SHENG, LI ZONG-XIANG, NING DING, LI HAO, ZHOU JIAN-PING, LIU QUAN-MIN <br/><p>This paper presents the effects of electron irradiation on the characteristics of single mode optical fibers doped with rare earth Er3+. The parameters of optical fibers are measured, prior to irradiation and after irradiation and annealing. It has been found that absorption loss in the wave length range of 0.80-1.60 μm is greatly lager than those of unirradiationed fibers. The irradiation induced loss obeys the following exponential laws: LUV =0.342exp [E(eV)/0.166] in the range of 0.80-1.20 urn and LIR = 2.2×104exp [-6.08E(eV)] in the range of 1.20-1.60 μm range. During annealing, the induced loss at longer wave length decreases, but that near 0.80 μm increases. Finally, the paper discusses the mechanism of loss variations. The displaced probability of oxygen and silicon atoms in electron irradiation is estimated to be 7.1×10-8 and 3.9×l0-8, respectively. The loss induced by displaced atoms is 200 times langer than that induced by the same amount of OH- at 1.40 μm. The process of annealing of the loss essentially occurs in two steps, i.e., by neutralization of the free electron and reforming of the broken bonds.</p> <br/>Acta Physica Sinica. 1991 40(4): 560-567. Published 1991-02-05 Author(s): HU KAI-SHENG, LI ZONG-XIANG, NING DING, LI HAO, ZHOU JIAN-PING, LIU QUAN-MIN <br/><p>This paper presents the effects of electron irradiation on the characteristics of single mode optical fibers doped with rare earth Er3+. The parameters of optical fibers are measured, prior to irradiation and after irradiation and annealing. It has been found that absorption loss in the wave length range of 0.80-1.60 μm is greatly lager than those of unirradiationed fibers. The irradiation induced loss obeys the following exponential laws: LUV =0.342exp [E(eV)/0.166] in the range of 0.80-1.20 urn and LIR = 2.2×104exp [-6.08E(eV)] in the range of 1.20-1.60 μm range. During annealing, the induced loss at longer wave length decreases, but that near 0.80 μm increases. Finally, the paper discusses the mechanism of loss variations. The displaced probability of oxygen and silicon atoms in electron irradiation is estimated to be 7.1×10-8 and 3.9×l0-8, respectively. The loss induced by displaced atoms is 200 times langer than that induced by the same amount of OH- at 1.40 μm. The process of annealing of the loss essentially occurs in two steps, i.e., by neutralization of the free electron and reforming of the broken bonds.</p> <br/>Acta Physica Sinica. 1991 40(4): 560-567. Published 1991-02-05 EFFECTS OF ELECTRON IRRADIATION ON LOSS CHARACTERISTICS OF SINGLE MODE OPTICAL FIBERS DOPED WITH RARE EARTH Er3+ HU KAI-SHENG, LI ZONG-XIANG, NING DING, LI HAO, ZHOU JIAN-PING, LIU QUAN-MIN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 560-567. article doi:10.7498/aps.40.560 10.7498/aps.40.560 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.560 560-567 //www.getgobooth.com/en/article/doi/10.7498/aps.40.568 Author(s): MA JIN-XIU, CHEN RONG-QING, XU ZHI-ZHAN <br/><p>This paper studies the nearly degenerate four-wave mixing in plasma which is caused by the electron plasma wave excited via the process of stimulated Raman scattering. The third-order nonlinear susceptibilities of the plasma are derived analytically and the condition to satisfy the phase matching is discussed. The couple-wave equations are solved to obtain the phase conjugate reflectivity. The dependence of the reflectivily on the frequency difference between the pump and the probe beam as well as on the interaction length is studied both analytically and numerically.</p> <br/>Acta Physica Sinica. 1991 40(4): 568-574. Published 1991-02-05 Author(s): MA JIN-XIU, CHEN RONG-QING, XU ZHI-ZHAN <br/><p>This paper studies the nearly degenerate four-wave mixing in plasma which is caused by the electron plasma wave excited via the process of stimulated Raman scattering. The third-order nonlinear susceptibilities of the plasma are derived analytically and the condition to satisfy the phase matching is discussed. The couple-wave equations are solved to obtain the phase conjugate reflectivity. The dependence of the reflectivily on the frequency difference between the pump and the probe beam as well as on the interaction length is studied both analytically and numerically.</p> <br/>Acta Physica Sinica. 1991 40(4): 568-574. Published 1991-02-05 NEARLY DEGENERATE FOUR-WAVE MIXING IN PLASMA BY STIMULATED RAMAN SCATTERING MA JIN-XIU, CHEN RONG-QING, XU ZHI-ZHAN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 568-574. article doi:10.7498/aps.40.568 10.7498/aps.40.568 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.568 568-574 //www.getgobooth.com/en/article/doi/10.7498/aps.40.575 Author(s): LI XIAO-GUANG, HE YI-ZHEN <br/><p>In this paper we analyze and discuss the characteristics of internal friction of metallic glasses near glass transition temperature Tg based on the model of free volume and mechanical theory of solids. The relationship between stress and strain was obtained if the proportion occupied by solid-like and liquid-like regions in the matrix of glassy state was considered. It is found theoretically that the internal friction peak being of relaxation type can appear in the vicinity of Tg and the modulus decrease dramatically during glass transition. The theoretical analysis is essentially in agreement with experimental results.</p> <br/>Acta Physica Sinica. 1991 40(4): 575-583. Published 1991-02-05 Author(s): LI XIAO-GUANG, HE YI-ZHEN <br/><p>In this paper we analyze and discuss the characteristics of internal friction of metallic glasses near glass transition temperature Tg based on the model of free volume and mechanical theory of solids. The relationship between stress and strain was obtained if the proportion occupied by solid-like and liquid-like regions in the matrix of glassy state was considered. It is found theoretically that the internal friction peak being of relaxation type can appear in the vicinity of Tg and the modulus decrease dramatically during glass transition. The theoretical analysis is essentially in agreement with experimental results.</p> <br/>Acta Physica Sinica. 1991 40(4): 575-583. Published 1991-02-05 THEORETICAL ANALYSIS ON THE INTERNAL FRICTION OF METALLIC GLASSES NEAR Tg LI XIAO-GUANG, HE YI-ZHEN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 575-583. article doi:10.7498/aps.40.575 10.7498/aps.40.575 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.575 575-583 //www.getgobooth.com/en/article/doi/10.7498/aps.40.584 Author(s): CHEN SHI-GANG <br/><p>The correlation dimensions of correlation clusters at the critical point of continuous phase transformation are studied. The correlation dimensions Dn= d-nβ/(n - l)v, the dimension of one cluster a = d-β/v and the dimension of the centres of cluster f(a)=d are derived rigorously, and their meanings are discussed.</p> <br/>Acta Physica Sinica. 1991 40(4): 584-587. Published 1991-02-05 Author(s): CHEN SHI-GANG <br/><p>The correlation dimensions of correlation clusters at the critical point of continuous phase transformation are studied. The correlation dimensions Dn= d-nβ/(n - l)v, the dimension of one cluster a = d-β/v and the dimension of the centres of cluster f(a)=d are derived rigorously, and their meanings are discussed.</p> <br/>Acta Physica Sinica. 1991 40(4): 584-587. Published 1991-02-05 FRACTAL STRUCTURE AT THE CRITICAL POINT OF CONTINUOUS PHASE TRANSFORMATION CHEN SHI-GANG 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 584-587. article doi:10.7498/aps.40.584 10.7498/aps.40.584 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.584 584-587 //www.getgobooth.com/en/article/doi/10.7498/aps.40.588 Author(s): HU JIN-YUAN <br/><p>Kinetics of (Ba1-xPbx) TiO3 solid solution formation was studied by high-temperature X-ray diffraction. The relations among the concentration of lead and the reaction rate constant K, as well as activation energy Q and the kinetic parameter C are discussed.</p> <br/>Acta Physica Sinica. 1991 40(4): 588-595. Published 1991-02-05 Author(s): HU JIN-YUAN <br/><p>Kinetics of (Ba1-xPbx) TiO3 solid solution formation was studied by high-temperature X-ray diffraction. The relations among the concentration of lead and the reaction rate constant K, as well as activation energy Q and the kinetic parameter C are discussed.</p> <br/>Acta Physica Sinica. 1991 40(4): 588-595. Published 1991-02-05 KINETIC STUDY OF (Ba1-x,Pbx)TiO3 SOLID SOLUTION FORMATION HU JIN-YUAN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 588-595. article doi:10.7498/aps.40.588 10.7498/aps.40.588 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.588 588-595 //www.getgobooth.com/en/article/doi/10.7498/aps.40.596 Author(s): SU FANG, XU WEI, SU JUN <br/><p>Ionic conductivity and activation energy of 60 meshpowder, 120 mesh-powder, 200 mesh-powder, tablet pressed with powder and bulk piece of amorphous lithium ionic conductor P2O5-0.7Li2O-0.4LiCl-0.1Al2O3 in the range of 60℃-380℃ were investigated. It is found that decreasing the grain size can enhance ionic conductivity by 4 times and does not affect activation energy, owing to the effect of boundary layer in the same amorphous phase. Research after ionic conductivity measurement and X-ray diffraction of samples heated at 380℃ for 76 hours show that following the grain size becomes smaller, the crystallization process becomes easier. The bulk piece of amorphous sample not only has conductivity two orders higher than that of the tablet sample and lower activation energy, but also is more difficult to crystallize. Hence it possesses higher applicability. Study on DSC, conductivity, XRD and DTA of 60 mesh, 120 mesh, 200 mesh amorphous powder heated at 300℃ for 330 hours and at 350℃ for 612 hours shows that there are more than two amorphous phases and more complex interface effects among different phases in their amorphous phase separation.</p> <br/>Acta Physica Sinica. 1991 40(4): 596-603. Published 1991-02-05 Author(s): SU FANG, XU WEI, SU JUN <br/><p>Ionic conductivity and activation energy of 60 meshpowder, 120 mesh-powder, 200 mesh-powder, tablet pressed with powder and bulk piece of amorphous lithium ionic conductor P2O5-0.7Li2O-0.4LiCl-0.1Al2O3 in the range of 60℃-380℃ were investigated. It is found that decreasing the grain size can enhance ionic conductivity by 4 times and does not affect activation energy, owing to the effect of boundary layer in the same amorphous phase. Research after ionic conductivity measurement and X-ray diffraction of samples heated at 380℃ for 76 hours show that following the grain size becomes smaller, the crystallization process becomes easier. The bulk piece of amorphous sample not only has conductivity two orders higher than that of the tablet sample and lower activation energy, but also is more difficult to crystallize. Hence it possesses higher applicability. Study on DSC, conductivity, XRD and DTA of 60 mesh, 120 mesh, 200 mesh amorphous powder heated at 300℃ for 330 hours and at 350℃ for 612 hours shows that there are more than two amorphous phases and more complex interface effects among different phases in their amorphous phase separation.</p> <br/>Acta Physica Sinica. 1991 40(4): 596-603. Published 1991-02-05 INVESTIGATION ON IONIC CONDUCTIVITY AND STRUCTURE OF AMORPHOUS LITHIUM IONIC CONDUCTOR P2O5-0.7Li2O-0.4LiCl-0.1Al2O3 SU FANG, XU WEI, SU JUN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 596-603. article doi:10.7498/aps.40.596 10.7498/aps.40.596 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.596 596-603 //www.getgobooth.com/en/article/doi/10.7498/aps.40.604 Author(s): BAD SHI-NING, ZHU LI, XU YA-BO, LI ZHUO-ZHI <br/><p>The influence of coadsorbed alkali metal on the electronic structure of CO was studied by ARUPS with polarized and unpolarized light. A new peak at 6.3 eV was observed, it reflects a new orbital of CO with the presence of coadsorbed alkali atoms. A symmetry plane and an anti-symmetry plane for this orbital were found, which are paralell to the 〈001〉azimuth and 〈110〉azimuth of the crystal surface respectively. The symmetry results of CO coadsorbed with different kinds of alkali metal are the same.</p> <br/>Acta Physica Sinica. 1991 40(4): 604-609. Published 1991-02-05 Author(s): BAD SHI-NING, ZHU LI, XU YA-BO, LI ZHUO-ZHI <br/><p>The influence of coadsorbed alkali metal on the electronic structure of CO was studied by ARUPS with polarized and unpolarized light. A new peak at 6.3 eV was observed, it reflects a new orbital of CO with the presence of coadsorbed alkali atoms. A symmetry plane and an anti-symmetry plane for this orbital were found, which are paralell to the 〈001〉azimuth and 〈110〉azimuth of the crystal surface respectively. The symmetry results of CO coadsorbed with different kinds of alkali metal are the same.</p> <br/>Acta Physica Sinica. 1991 40(4): 604-609. Published 1991-02-05 INTERACTION BETWEEN ALKALI METAL AND CO ON Fe(110) SURFACE BAD SHI-NING, ZHU LI, XU YA-BO, LI ZHUO-ZHI 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 604-609. article doi:10.7498/aps.40.604 10.7498/aps.40.604 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.604 604-609 //www.getgobooth.com/en/article/doi/10.7498/aps.40.610 Author(s): LI FU-BIN <br/><p>The influence of the nonparabolicity of band structure on Fr?hlich polarons is studied theoretically. The model used applies a simplified two-band approximation. Nonparabolicity is found to affect both the polaronic binding energy and the effective-mass renormalization. Comparing with the earlier theories, in addition to band nonparabolicity, we have considered the polaron effects. The theory presented in this paper agrees well with experimental results.</p> <br/>Acta Physica Sinica. 1991 40(4): 610-615. Published 1991-02-05 Author(s): LI FU-BIN <br/><p>The influence of the nonparabolicity of band structure on Fr?hlich polarons is studied theoretically. The model used applies a simplified two-band approximation. Nonparabolicity is found to affect both the polaronic binding energy and the effective-mass renormalization. Comparing with the earlier theories, in addition to band nonparabolicity, we have considered the polaron effects. The theory presented in this paper agrees well with experimental results.</p> <br/>Acta Physica Sinica. 1991 40(4): 610-615. Published 1991-02-05 THEORY OF THE BAND NONPARABOLICITY EFFECTS ON FR?HLICH POLARONS LI FU-BIN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 610-615. article doi:10.7498/aps.40.610 10.7498/aps.40.610 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.610 610-615 //www.getgobooth.com/en/article/doi/10.7498/aps.40.616 Author(s): SHEN SAN-GUO, FAN XI-QING <br/><p>A simplified "five vacant hybrid orbital" model is proposed for the boron-vacancy complex, and the defect wave function are calculated using an empirical tight binding Green function method under extended defect potential approximation. The calculated hyperfine interaction constants of the nearest neighbors of the vacancy and the probability distribution of defect wave function localized at atomic distants from the vacancy, are in good agreement with the electron-nuclear double-resonance experiment. The deep energy obtained is comparable with the value measured by deep-level transient-spectroscopy. The theoretical results provide a strong support to the conclusion that boron atom is located at the lattice position next to the vacancy and the defect is a B-V+ charge state.</p> <br/>Acta Physica Sinica. 1991 40(4): 616-624. Published 1991-02-05 Author(s): SHEN SAN-GUO, FAN XI-QING <br/><p>A simplified "five vacant hybrid orbital" model is proposed for the boron-vacancy complex, and the defect wave function are calculated using an empirical tight binding Green function method under extended defect potential approximation. The calculated hyperfine interaction constants of the nearest neighbors of the vacancy and the probability distribution of defect wave function localized at atomic distants from the vacancy, are in good agreement with the electron-nuclear double-resonance experiment. The deep energy obtained is comparable with the value measured by deep-level transient-spectroscopy. The theoretical results provide a strong support to the conclusion that boron atom is located at the lattice position next to the vacancy and the defect is a B-V+ charge state.</p> <br/>Acta Physica Sinica. 1991 40(4): 616-624. Published 1991-02-05 ELECTRONIC STRUCTURE OF BORON-VACANCY COMPLEX IN SILICON SHEN SAN-GUO, FAN XI-QING 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 616-624. article doi:10.7498/aps.40.616 10.7498/aps.40.616 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.616 616-624 //www.getgobooth.com/en/article/doi/10.7498/aps.40.625 Author(s): LI HAI-YANG, ZHU LI, XU YA-BO, CAI LIAN-ZHEN <br/><p>Coadsorption of CO and K on Cu(lll) surface was investigated using a Kelvin probe. We found that CO can adsorb (probably dissociatively) on the potassium precovered Cu(lll) surface at room temperature. When θKmin, (θmin = 0.18) the adsorption of CO makes the work function increase. When θK&lt;θmin, the work function decreases at first, and then increases with amount of CO exposure. The results can be well accounted for by the jellium slab model.</p> <br/>Acta Physica Sinica. 1991 40(4): 625-629. Published 1991-02-05 Author(s): LI HAI-YANG, ZHU LI, XU YA-BO, CAI LIAN-ZHEN <br/><p>Coadsorption of CO and K on Cu(lll) surface was investigated using a Kelvin probe. We found that CO can adsorb (probably dissociatively) on the potassium precovered Cu(lll) surface at room temperature. When θKmin, (θmin = 0.18) the adsorption of CO makes the work function increase. When θK&lt;θmin, the work function decreases at first, and then increases with amount of CO exposure. The results can be well accounted for by the jellium slab model.</p> <br/>Acta Physica Sinica. 1991 40(4): 625-629. Published 1991-02-05 WORK FUNCTION STUDY OF CO AND K COADSORPTION ON Cu(lll) SURFACE LI HAI-YANG, ZHU LI, XU YA-BO, CAI LIAN-ZHEN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 625-629. article doi:10.7498/aps.40.625 10.7498/aps.40.625 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.625 625-629 //www.getgobooth.com/en/article/doi/10.7498/aps.40.630 Author(s): JIN XIN, ZHANG YI-TONG, LU MU, ZHANG CHANG-GUI, YAN YONG, YU YANG, SHEN JIAN-CANG, YAO XI-XIAN <br/><p>The preparing method of (BiPb)-Sr-Ca-Cu-O 2223 phase high-Tc superconductor is introduced. The magnetic relaxation rate dependence on applied magnetic field was measured by using a vibrating sample magnetometer. From the above results, the relationship of activation energy U0 vs. applied magnetic fuild B is discussed. We found that the functional form is U0-B-a in the magnetic field range of 0-0.23 T. The results is similar with that of Pa-lstra based on resistance broadening experiment for single crystals.</p> <br/>Acta Physica Sinica. 1991 40(4): 630-633. Published 1991-02-05 Author(s): JIN XIN, ZHANG YI-TONG, LU MU, ZHANG CHANG-GUI, YAN YONG, YU YANG, SHEN JIAN-CANG, YAO XI-XIAN <br/><p>The preparing method of (BiPb)-Sr-Ca-Cu-O 2223 phase high-Tc superconductor is introduced. The magnetic relaxation rate dependence on applied magnetic field was measured by using a vibrating sample magnetometer. From the above results, the relationship of activation energy U0 vs. applied magnetic fuild B is discussed. We found that the functional form is U0-B-a in the magnetic field range of 0-0.23 T. The results is similar with that of Pa-lstra based on resistance broadening experiment for single crystals.</p> <br/>Acta Physica Sinica. 1991 40(4): 630-633. Published 1991-02-05 MAGNETIC FLUX PINNING AND CREEP IN (BiPb)-Sr-Ca-Cu-O 2223 PHASE HIGH-Tc SUPERCONDUCTOR JIN XIN, ZHANG YI-TONG, LU MU, ZHANG CHANG-GUI, YAN YONG, YU YANG, SHEN JIAN-CANG, YAO XI-XIAN 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 630-633. article doi:10.7498/aps.40.630 10.7498/aps.40.630 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.630 630-633 //www.getgobooth.com/en/article/doi/10.7498/aps.40.634 Author(s): YU ZHENG, DING SHI-YING, YAN JIA-LIE, REN HONG-TAO <br/><p>Transport critical current density Jc and hysteresis loop at different field-sample orientations were measured for both melt-textured growth (MTG) and sintered YBa2Cu3Oy (YBCO) sample. Very high Jc (78K, 0 Oe) of 3.5×104A/cm2 has been obtained for the MTG YBCO sample. The experimental results show strong evidence of that the high Jc in MTG YBCO results mainly from the significant reduction of weak links because the bulk Jc for MTG sample are almost the same as the intragrain Jc for sintered sample. We also show that the Jc parallel to a-b plane is about an order of magnitude higher than that normal to a-b plane(Jc∥≈10Jc⊥).</p> <br/>Acta Physica Sinica. 1991 40(4): 634-641. Published 1991-02-05 Author(s): YU ZHENG, DING SHI-YING, YAN JIA-LIE, REN HONG-TAO <br/><p>Transport critical current density Jc and hysteresis loop at different field-sample orientations were measured for both melt-textured growth (MTG) and sintered YBa2Cu3Oy (YBCO) sample. Very high Jc (78K, 0 Oe) of 3.5×104A/cm2 has been obtained for the MTG YBCO sample. The experimental results show strong evidence of that the high Jc in MTG YBCO results mainly from the significant reduction of weak links because the bulk Jc for MTG sample are almost the same as the intragrain Jc for sintered sample. We also show that the Jc parallel to a-b plane is about an order of magnitude higher than that normal to a-b plane(Jc∥≈10Jc⊥).</p> <br/>Acta Physica Sinica. 1991 40(4): 634-641. Published 1991-02-05 MEASUREMENT OF c-AXIS CRITICAL CURRENT DENSITY FOR YBa2Cu3O7-x YU ZHENG, DING SHI-YING, YAN JIA-LIE, REN HONG-TAO 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 634-641. article doi:10.7498/aps.40.634 10.7498/aps.40.634 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.634 634-641 //www.getgobooth.com/en/article/doi/10.7498/aps.40.642 Author(s): GU GEN-DA, CAI WEI-LI, YANG PEI-FANG, WANG YU-XIA, YAO LIAN-ZENG, HUANG DA-JIN, RUAN YAO-ZHONG, ZHOU GUI-EN, CHENG TING-ZHU, ZHANG YU-HENG <br/><p>Superconducting single crystals of Bi-Sr-Ca-Cu-O 2212 phase have been sucessfully grown by a directional solidification method. The maximum size of single crystal reached 19+3×mm3. The (001) plane of the crystals is parallel to the growth direction. The crystals tend to grow along the [010] direction. Back-reflection Laue pattern revealed that the large crystal is indeed one single crystal. Measurements of electrical resistivity and ac susceptibility showed that Tc(zero) of the single crystals annealed in O2 was 81.5 K.</p> <br/>Acta Physica Sinica. 1991 40(4): 642-645. Published 1991-02-05 Author(s): GU GEN-DA, CAI WEI-LI, YANG PEI-FANG, WANG YU-XIA, YAO LIAN-ZENG, HUANG DA-JIN, RUAN YAO-ZHONG, ZHOU GUI-EN, CHENG TING-ZHU, ZHANG YU-HENG <br/><p>Superconducting single crystals of Bi-Sr-Ca-Cu-O 2212 phase have been sucessfully grown by a directional solidification method. The maximum size of single crystal reached 19+3×mm3. The (001) plane of the crystals is parallel to the growth direction. The crystals tend to grow along the [010] direction. Back-reflection Laue pattern revealed that the large crystal is indeed one single crystal. Measurements of electrical resistivity and ac susceptibility showed that Tc(zero) of the single crystals annealed in O2 was 81.5 K.</p> <br/>Acta Physica Sinica. 1991 40(4): 642-645. Published 1991-02-05 DIRECTIONAL GROWTH OF Bi -Sr-Ca-Cu-O2212 PHASE SUPERCONDUCTING SINGLE CRYSTAL GU GEN-DA, CAI WEI-LI, YANG PEI-FANG, WANG YU-XIA, YAO LIAN-ZENG, HUANG DA-JIN, RUAN YAO-ZHONG, ZHOU GUI-EN, CHENG TING-ZHU, ZHANG YU-HENG 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 642-645. article doi:10.7498/aps.40.642 10.7498/aps.40.642 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.642 642-645 //www.getgobooth.com/en/article/doi/10.7498/aps.40.646 Author(s): SONG YU <br/><p>The strong periodic surface electric strength caused by spontaneous polarization may be used as an undulator instead of Wiggler magnet to produce free electron laser. But the free electrons falling on it screen the potential gradually.Some screen-relif measures are proposed in this paper. Every positive polarized domain on the polarized crystal surface of LiNbO3 is covered with a piece of insulator film and covered further with an earthed conductor film to protect this polarized crystal surface from electric screening by free electrons. It is proved that the sum of induced charges on two surfaces of each part in these conductor films is zero. The free electrons falling on it will escape into the Earth at once.</p> <br/>Acta Physica Sinica. 1991 40(4): 646-652. Published 1991-02-05 Author(s): SONG YU <br/><p>The strong periodic surface electric strength caused by spontaneous polarization may be used as an undulator instead of Wiggler magnet to produce free electron laser. But the free electrons falling on it screen the potential gradually.Some screen-relif measures are proposed in this paper. Every positive polarized domain on the polarized crystal surface of LiNbO3 is covered with a piece of insulator film and covered further with an earthed conductor film to protect this polarized crystal surface from electric screening by free electrons. It is proved that the sum of induced charges on two surfaces of each part in these conductor films is zero. The free electrons falling on it will escape into the Earth at once.</p> <br/>Acta Physica Sinica. 1991 40(4): 646-652. Published 1991-02-05 RESEARCH ABOUT SCREEN-RELIEF MEASURES FOR LiNbO3 SURFACE POTENTIAL SONG YU 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 646-652. article doi:10.7498/aps.40.646 10.7498/aps.40.646 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.646 646-652 //www.getgobooth.com/en/article/doi/10.7498/aps.40.653 Author(s): SHEN DE-FANG, DU TENG-DA, WANG LI-JUAN, ZHANG WEI-ZHU <br/><p>Bi substitute DyIG thin films having high coercive force and good squareness have been prepared on glass substrates by sputtering. The Faraday rotation amounts to about 7.5°/μm at wavelength of 500 nm. The magnetic domains are stable after thermal magnetic recording. The interference of magnetooptical thin films is investigated when the surface of films is deposited with different metals. Using this charecteristics the optimum disign for garnet recording discs can be achieved.</p> <br/>Acta Physica Sinica. 1991 40(4): 653-658. Published 1991-02-05 Author(s): SHEN DE-FANG, DU TENG-DA, WANG LI-JUAN, ZHANG WEI-ZHU <br/><p>Bi substitute DyIG thin films having high coercive force and good squareness have been prepared on glass substrates by sputtering. The Faraday rotation amounts to about 7.5°/μm at wavelength of 500 nm. The magnetic domains are stable after thermal magnetic recording. The interference of magnetooptical thin films is investigated when the surface of films is deposited with different metals. Using this charecteristics the optimum disign for garnet recording discs can be achieved.</p> <br/>Acta Physica Sinica. 1991 40(4): 653-658. Published 1991-02-05 A STUDY ON MANGETO-OPTICAL PROPERTIES AND INTERFERECT EFFECT OF Bi SUBSTITUTED DyIG SPUTTERED THIN FILMS SHEN DE-FANG, DU TENG-DA, WANG LI-JUAN, ZHANG WEI-ZHU 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 653-658. article doi:10.7498/aps.40.653 10.7498/aps.40.653 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.653 653-658 //www.getgobooth.com/en/article/doi/10.7498/aps.40.659 Author(s): SHAO QI-YUN, HUO YU-KUN, CHEN JIAN-XIN, WU SHI-MING, PAN ZHENG-YING <br/><p>In this paper, the effects of the incidence angle of the ion-bombardment on the puttering parameters ire investigated by using Monte Carlo simulation based on the binary collision approximation. The dependence of sputtering yields, energy and angular distribution as well as threshold energy of sputtered particles on incidence angle are discussed. The results of calculation are compared with data given by semi-empirical formula and measurments.</p> <br/>Acta Physica Sinica. 1991 40(4): 659-666. Published 1991-02-05 Author(s): SHAO QI-YUN, HUO YU-KUN, CHEN JIAN-XIN, WU SHI-MING, PAN ZHENG-YING <br/><p>In this paper, the effects of the incidence angle of the ion-bombardment on the puttering parameters ire investigated by using Monte Carlo simulation based on the binary collision approximation. The dependence of sputtering yields, energy and angular distribution as well as threshold energy of sputtered particles on incidence angle are discussed. The results of calculation are compared with data given by semi-empirical formula and measurments.</p> <br/>Acta Physica Sinica. 1991 40(4): 659-666. Published 1991-02-05 INFLUENCE OF THE INCIDENCE ANGLE OF THE ION-BOMBARDMENT ON THE SPUTTERING PARAMETERS SHAO QI-YUN, HUO YU-KUN, CHEN JIAN-XIN, WU SHI-MING, PAN ZHENG-YING 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 659-666. article doi:10.7498/aps.40.659 10.7498/aps.40.659 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.659 659-666 //www.getgobooth.com/en/article/doi/10.7498/aps.40.667 Author(s): LUO CHUN-PING, MENG GE, QI SHANG-XUE, LIN ZHANG-DA <br/><p>The vibration modes of hydrogen-atom adsorption on the diamond surface were studied with high resolution-electron energy loss spectroscopy. Two main losses were observed at 360 meV and 160 meV. They are assigned to the C-H stretch vibrations and the angle-changing deformation vibrations respectively. Replacing H-atom with D-atom, isotropic shifts were observed in the loss spectra. Heating the diamond surface to 900℃, all of the loss features disappear, but an inelastic continuous loss-structure was observed. Due to H-atom desorp-tion, the dangling-bonds became horizontal bonds on the diamond surface, resulting in the gra-phitization of diamond surface. The appearance of the inelastic continuous loss-structure was the characteristic of graphite π-band. The graphitization of the diamond surface was affirmed further by UPS and AES studies.</p> <br/>Acta Physica Sinica. 1991 40(4): 667-672. Published 1991-02-05 Author(s): LUO CHUN-PING, MENG GE, QI SHANG-XUE, LIN ZHANG-DA <br/><p>The vibration modes of hydrogen-atom adsorption on the diamond surface were studied with high resolution-electron energy loss spectroscopy. Two main losses were observed at 360 meV and 160 meV. They are assigned to the C-H stretch vibrations and the angle-changing deformation vibrations respectively. Replacing H-atom with D-atom, isotropic shifts were observed in the loss spectra. Heating the diamond surface to 900℃, all of the loss features disappear, but an inelastic continuous loss-structure was observed. Due to H-atom desorp-tion, the dangling-bonds became horizontal bonds on the diamond surface, resulting in the gra-phitization of diamond surface. The appearance of the inelastic continuous loss-structure was the characteristic of graphite π-band. The graphitization of the diamond surface was affirmed further by UPS and AES studies.</p> <br/>Acta Physica Sinica. 1991 40(4): 667-672. Published 1991-02-05 STUDIES ON THE INTERACTION OF HYDROGEN ATOMS WITH DIAMOND SURFACE LUO CHUN-PING, MENG GE, QI SHANG-XUE, LIN ZHANG-DA 1991-02-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1991 40(4): 667-672. article doi:10.7498/aps.40.667 10.7498/aps.40.667 Acta Physica Sinica 40 4 1991-02-05 //www.getgobooth.com/en/article/doi/10.7498/aps.40.667 667-672

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