//www.getgobooth.com/ 必威体育下载 daily 15 2024-09-05 15:36:21 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-09-05 15:36:21 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.46.2289 Author(s): LI GUANG-HUI <br/><p>A new definition of four kinds of raising and lowering operators of an isotropic harmonic oscillator is given. Their matrix elements and normalizing constants are calculated.</p> <br/>Acta Physica Sinica. 1997 46(12): 2289-2293. Published 1997-06-05 Author(s): LI GUANG-HUI <br/><p>A new definition of four kinds of raising and lowering operators of an isotropic harmonic oscillator is given. Their matrix elements and normalizing constants are calculated.</p> <br/>Acta Physica Sinica. 1997 46(12): 2289-2293. Published 1997-06-05 MATRIX ELEMENTS OF RAISING AND LOWERING OPERATORS OF AN ISOTROPIC HARMONIC OSCILLATOR LI GUANG-HUI 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2289-2293. article doi:10.7498/aps.46.2289 10.7498/aps.46.2289 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2289 2289-2293 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2294 Author(s): ZHANG JING-YI <br/><p>This paper gives a conformally flat interior solution of Einstein Maxwell equations for a stationary spherically symmetric distribution of sphere possessing both electric and magnetic charges. The solution is physically reasonable.</p> <br/>Acta Physica Sinica. 1997 46(12): 2294-2299. Published 1997-06-05 Author(s): ZHANG JING-YI <br/><p>This paper gives a conformally flat interior solution of Einstein Maxwell equations for a stationary spherically symmetric distribution of sphere possessing both electric and magnetic charges. The solution is physically reasonable.</p> <br/>Acta Physica Sinica. 1997 46(12): 2294-2299. Published 1997-06-05 A CONFORMALLY FLAT SOLUTION OF EINSTEIN MAXWELL EQUATIONS FOR A STATIONARY SPHERICALLY SYMMETRIC DISTRIBUTION OF SPHERE POSSESSING BOTH ELECTRIC AND MAGNETIC CHARGES ZHANG JING-YI 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2294-2299. article doi:10.7498/aps.46.2294 10.7498/aps.46.2294 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2294 2294-2299 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2300 Author(s): LIU LU-XIN <br/><p>The matter system in the Schwarzschild gravitational field is discussed in terms of the formal ism of the relativistic thermodynamics. The stellar structure equation is obtained, and both the statical and the moving particle systems are investigated. The solutions derived agree with the Newton theories under the condition of classical approximation.</p> <br/>Acta Physica Sinica. 1997 46(12): 2300-2304. Published 1997-06-05 Author(s): LIU LU-XIN <br/><p>The matter system in the Schwarzschild gravitational field is discussed in terms of the formal ism of the relativistic thermodynamics. The stellar structure equation is obtained, and both the statical and the moving particle systems are investigated. The solutions derived agree with the Newton theories under the condition of classical approximation.</p> <br/>Acta Physica Sinica. 1997 46(12): 2300-2304. Published 1997-06-05 APPLICATIONS OF THE THEORY OF RELATIVISTIC THERMODYNAMICS TO THE SCHWARZSCHILD MATTER SYSTEM IN THE GRAVITATIONAL FIELD LIU LU-XIN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2300-2304. article doi:10.7498/aps.46.2300 10.7498/aps.46.2300 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2300 2300-2304 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2305 Author(s): WANG JIA-FU, LIU FENG, WANG JUN-YI, CHEN GUANG, WANG WEI <br/><p>By simulating the frequency behaviors of the input thresholds in a bistable system and a Hindmarsh Rose neuron, respectively, we study how the input thresholds depend on the frequency of input signal in both non excitable and excitable nonlinear systems in which stochastic resonance may appear. We also present an approximate approach to get the frequency characteristics of input threshold analytically and analyze the unusual minima of the frequency characteristics in excitable systems.</p> <br/>Acta Physica Sinica. 1997 46(12): 2305-2312. Published 1997-06-05 Author(s): WANG JIA-FU, LIU FENG, WANG JUN-YI, CHEN GUANG, WANG WEI <br/><p>By simulating the frequency behaviors of the input thresholds in a bistable system and a Hindmarsh Rose neuron, respectively, we study how the input thresholds depend on the frequency of input signal in both non excitable and excitable nonlinear systems in which stochastic resonance may appear. We also present an approximate approach to get the frequency characteristics of input threshold analytically and analyze the unusual minima of the frequency characteristics in excitable systems.</p> <br/>Acta Physica Sinica. 1997 46(12): 2305-2312. Published 1997-06-05 FREQUENCY CHARACTERISTICS OF THE INPUT THRESHOLDS OF STOCHASTIC RESONANT SYSTEMS WANG JIA-FU, LIU FENG, WANG JUN-YI, CHEN GUANG, WANG WEI 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2305-2312. article doi:10.7498/aps.46.2305 10.7498/aps.46.2305 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2305 2305-2312 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2313 Author(s): CHEN BAO-ZHEN <br/><p>How to insert the final Coulomb interaction into Keldysh-Faisal-Reiss theory is discussed in A guage. The correct low intensity behavior predicted by the improved theory and a brief comparison with that predicted in E guage, then, are shown. Finally, a comment on the numeric result is- given.</p> <br/>Acta Physica Sinica. 1997 46(12): 2313-2319. Published 1997-06-05 Author(s): CHEN BAO-ZHEN <br/><p>How to insert the final Coulomb interaction into Keldysh-Faisal-Reiss theory is discussed in A guage. The correct low intensity behavior predicted by the improved theory and a brief comparison with that predicted in E guage, then, are shown. Finally, a comment on the numeric result is- given.</p> <br/>Acta Physica Sinica. 1997 46(12): 2313-2319. Published 1997-06-05 SOME IMPROVEMENTS ON KELDYSH-FAISAL-REISS THEORY CHEN BAO-ZHEN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2313-2319. article doi:10.7498/aps.46.2313 10.7498/aps.46.2313 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2313 2313-2319 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2320 Author(s): ZHANG SUI-MENG, CHEN ZHANG-JIN, SHI QI-CUN, XU KE-ZUN <br/><p>Based on the BBK theory, the influence of momentum correlation in the final state on the triple differential cross sections (TDCS) is considered. Then the TDCS for electron impact ionization of helium at a symmetric coplanar energy sharing geometry are calculated. An excellent agreement with the recent absolute measurement of helium is found in the present calculation, compared with other theoretical models.</p> <br/>Acta Physica Sinica. 1997 46(12): 2320-2324. Published 1997-06-05 Author(s): ZHANG SUI-MENG, CHEN ZHANG-JIN, SHI QI-CUN, XU KE-ZUN <br/><p>Based on the BBK theory, the influence of momentum correlation in the final state on the triple differential cross sections (TDCS) is considered. Then the TDCS for electron impact ionization of helium at a symmetric coplanar energy sharing geometry are calculated. An excellent agreement with the recent absolute measurement of helium is found in the present calculation, compared with other theoretical models.</p> <br/>Acta Physica Sinica. 1997 46(12): 2320-2324. Published 1997-06-05 LOW ENERGY TRIPLE DIFFERENTIAL CROSS SECTIONS FOR ELECTRON IMPACT IONIZATION OF HELIUM ZHANG SUI-MENG, CHEN ZHANG-JIN, SHI QI-CUN, XU KE-ZUN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2320-2324. article doi:10.7498/aps.46.2320 10.7498/aps.46.2320 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2320 2320-2324 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2325 Author(s): JIN CHONG-JUN, QIN BAI, YANG MIAO, QIN RU-HU <br/><p>In this paper we develop the plane wave method for calculating photonic band structure in chiral medium through magnetic component, and on this basis, calculate the photonic band structure of the face centered cubic (fcc) lattice made of chiral medium. Result shows that the cut off frequency, below which no propagating modes exist, appears in the two kinds of fcc lattices, i.e.,the array of chiral “spherical atoms” in dielectric material and the array of dielectric “spherical atoms” in chiral matrix. The result is compared with that obtained through electric component, and the difference between them is discussed.</p> <br/>Acta Physica Sinica. 1997 46(12): 2325-2329. Published 1997-06-05 Author(s): JIN CHONG-JUN, QIN BAI, YANG MIAO, QIN RU-HU <br/><p>In this paper we develop the plane wave method for calculating photonic band structure in chiral medium through magnetic component, and on this basis, calculate the photonic band structure of the face centered cubic (fcc) lattice made of chiral medium. Result shows that the cut off frequency, below which no propagating modes exist, appears in the two kinds of fcc lattices, i.e.,the array of chiral “spherical atoms” in dielectric material and the array of dielectric “spherical atoms” in chiral matrix. The result is compared with that obtained through electric component, and the difference between them is discussed.</p> <br/>Acta Physica Sinica. 1997 46(12): 2325-2329. Published 1997-06-05 PHOTONIC BAND STRUCTURE OF FACE CENTERED CUBIC LATTICE IN CHIRAL MEDIUM JIN CHONG-JUN, QIN BAI, YANG MIAO, QIN RU-HU 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2325-2329. article doi:10.7498/aps.46.2325 10.7498/aps.46.2325 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2325 2325-2329 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2330 Author(s): ZHANG HAN-ZHUANG, GAO JIN-YUE <br/><p>We discussed transverse diffraction effects of probe and driving fields on the gain in the model of Raman driven four level atomic system. The calculated results showed that the spectrum of the probe field has different structure compared with that in plane wave approximation due to the transverse diffraction effects of light fields, and the optimum focal position of a focus lens for the maximum gain is in the vicinity of a sample cell.</p> <br/>Acta Physica Sinica. 1997 46(12): 2330-2343. Published 1997-06-05 Author(s): ZHANG HAN-ZHUANG, GAO JIN-YUE <br/><p>We discussed transverse diffraction effects of probe and driving fields on the gain in the model of Raman driven four level atomic system. The calculated results showed that the spectrum of the probe field has different structure compared with that in plane wave approximation due to the transverse diffraction effects of light fields, and the optimum focal position of a focus lens for the maximum gain is in the vicinity of a sample cell.</p> <br/>Acta Physica Sinica. 1997 46(12): 2330-2343. Published 1997-06-05 TRANSVERSE DIFFRACTION EFFECTS OF LIGHT FIELDS ON THE GAIN WITHOUT POPULATION INVERSION ZHANG HAN-ZHUANG, GAO JIN-YUE 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2330-2343. article doi:10.7498/aps.46.2330 10.7498/aps.46.2330 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2330 2330-2343 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2344 Author(s): ZHANG DENG-YU, ZHAN MING-SHENG <br/><p>We propose a method for constructing Fredkin gate by using basic 2 bit quantum gates,which is based on A.Darenco's work.Compared with H.F.Chau's scheme,this scheme is easier to construct and to understand,as well as to put into practice.</p> <br/>Acta Physica Sinica. 1997 46(12): 2344-2347. Published 1997-06-05 Author(s): ZHANG DENG-YU, ZHAN MING-SHENG <br/><p>We propose a method for constructing Fredkin gate by using basic 2 bit quantum gates,which is based on A.Darenco's work.Compared with H.F.Chau's scheme,this scheme is easier to construct and to understand,as well as to put into practice.</p> <br/>Acta Physica Sinica. 1997 46(12): 2344-2347. Published 1997-06-05 AN EASY WAY FOR CONSTRUCTING FREDKIN QUANTUM GATE ZHANG DENG-YU, ZHAN MING-SHENG 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2344-2347. article doi:10.7498/aps.46.2344 10.7498/aps.46.2344 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2344 2344-2347 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2348 Author(s): TAN WEI-HAN, LIU JUAN <br/><p>In view of the divergent expectation value of photon number in Pegg-Barnett phase state,in this paper the phase operator,phase states for finite energy system are defined.Its orthogonality,completeness and application in the phase fluctuation calculation are studied.</p> <br/>Acta Physica Sinica. 1997 46(12): 2348-2358. Published 1997-06-05 Author(s): TAN WEI-HAN, LIU JUAN <br/><p>In view of the divergent expectation value of photon number in Pegg-Barnett phase state,in this paper the phase operator,phase states for finite energy system are defined.Its orthogonality,completeness and application in the phase fluctuation calculation are studied.</p> <br/>Acta Physica Sinica. 1997 46(12): 2348-2358. Published 1997-06-05 PHASE OPERATOR AND PHASE STATES FOR FINITE ENERGY SYSTEM TAN WEI-HAN, LIU JUAN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2348-2358. article doi:10.7498/aps.46.2348 10.7498/aps.46.2348 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2348 2348-2358 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2359 Author(s): DUAN YI-SHI, YU ZHONG-YUAN, WU ZHEN-SEN <br/><p>Small amplitude soliton solutions are obtained which satisfy the coupled nonlinear Schr?dinger equations governing optical pulses propagation in the birefringence optical fiber.</p> <br/>Acta Physica Sinica. 1997 46(12): 2359-2362. Published 1997-06-05 Author(s): DUAN YI-SHI, YU ZHONG-YUAN, WU ZHEN-SEN <br/><p>Small amplitude soliton solutions are obtained which satisfy the coupled nonlinear Schr?dinger equations governing optical pulses propagation in the birefringence optical fiber.</p> <br/>Acta Physica Sinica. 1997 46(12): 2359-2362. Published 1997-06-05 SMALL AMPLITUDE SOLITON SOLUTIONS OF THE COUPLED NONLINEAR SCHR?DINGER EQUATIONS IN BIREFRINGENCE OPTICAL FIBER DUAN YI-SHI, YU ZHONG-YUAN, WU ZHEN-SEN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2359-2362. article doi:10.7498/aps.46.2359 10.7498/aps.46.2359 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2359 2359-2362 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2363 Author(s): SHANG XIAO-MING, WANG CONG-FANG, WANG JING-JING, ZOU YING-HUA, YANG WEN-JUN, SONG YAN-LIN, LUO CHUAN-QIU, CHEN HUI-YING <br/><p>The transient optical Kerr effect (OKE) and optical induced absorption of emeraldine base (EB) in dimethylformamide solution have been investigated with femtosecond laser pulses.Only a ultrafast component of OKE of EB solution is observed and its dephasing time is given by theoretical fitting.The third-order nonlinear optical susceptibility of EB solution is also determined.Two-photon absorption is proved to be the predominant mechanism causing the observed optical limiting behavior.</p> <br/>Acta Physica Sinica. 1997 46(12): 2363-2368. Published 1997-06-05 Author(s): SHANG XIAO-MING, WANG CONG-FANG, WANG JING-JING, ZOU YING-HUA, YANG WEN-JUN, SONG YAN-LIN, LUO CHUAN-QIU, CHEN HUI-YING <br/><p>The transient optical Kerr effect (OKE) and optical induced absorption of emeraldine base (EB) in dimethylformamide solution have been investigated with femtosecond laser pulses.Only a ultrafast component of OKE of EB solution is observed and its dephasing time is given by theoretical fitting.The third-order nonlinear optical susceptibility of EB solution is also determined.Two-photon absorption is proved to be the predominant mechanism causing the observed optical limiting behavior.</p> <br/>Acta Physica Sinica. 1997 46(12): 2363-2368. Published 1997-06-05 ULTRAFAST OPTICAL KERR EFFECT AND OPTICAL INDUCED ABSORPTION OF EMERALDINE BASE SHANG XIAO-MING, WANG CONG-FANG, WANG JING-JING, ZOU YING-HUA, YANG WEN-JUN, SONG YAN-LIN, LUO CHUAN-QIU, CHEN HUI-YING 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2363-2368. article doi:10.7498/aps.46.2363 10.7498/aps.46.2363 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2363 2363-2368 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2369 Author(s): SUN JUN-QIANG, HUANG DE-XIU, YI HE-QING <br/><p>Wavelength conversion due to gain saturation in a semiconductor laser amplifier(SLA) is theoretically analyzed and also-studied experimentally based on small signal model.An analytic expression is developed describing the relationship between-conversion efficiency and characteristic parameters of SLA. The numerical simulation results show that the frequency response of the converter is not only limited to the carrier lifetime, but also affected by the saturation power, gain and waveguide internal loss of SLA.</p> <br/>Acta Physica Sinica. 1997 46(12): 2369-2375. Published 1997-06-05 Author(s): SUN JUN-QIANG, HUANG DE-XIU, YI HE-QING <br/><p>Wavelength conversion due to gain saturation in a semiconductor laser amplifier(SLA) is theoretically analyzed and also-studied experimentally based on small signal model.An analytic expression is developed describing the relationship between-conversion efficiency and characteristic parameters of SLA. The numerical simulation results show that the frequency response of the converter is not only limited to the carrier lifetime, but also affected by the saturation power, gain and waveguide internal loss of SLA.</p> <br/>Acta Physica Sinica. 1997 46(12): 2369-2375. Published 1997-06-05 SMALL SIGNAL ANALYSIS OF WAVELENGTH CONVERSION IN SEMICONDUCTOR LASER AMPLIFIERS BASED ON GAIN SATURATION SUN JUN-QIANG, HUANG DE-XIU, YI HE-QING 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2369-2375. article doi:10.7498/aps.46.2369 10.7498/aps.46.2369 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2369 2369-2375 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2376 Author(s): GONG YE, WEN XIAO-JUN, ZHANG PENG-YUN, DENG XIN-LU <br/><p>In this paper,we use the Monte Carlo method to simulate the complete course,in which the ions pass through the neutral,sheath,and the shield regions of a virtual cathode formed by the secondary electrons near the workpiece surface,and finally are absorbed by the surface of the workpiece with negative bias in ECR microwave plasma.The nonlinear cylinder Poisson equations is solved successfully with “trial” method,and the smoothed and self limits spectrum of potential and distributions of energy and angle at the surface of workpiece are obtained.The magnetic filed,gas pressure and secondary effects on the potential of sheath are also discussed.</p> <br/>Acta Physica Sinica. 1997 46(12): 2376-2383. Published 1997-06-05 Author(s): GONG YE, WEN XIAO-JUN, ZHANG PENG-YUN, DENG XIN-LU <br/><p>In this paper,we use the Monte Carlo method to simulate the complete course,in which the ions pass through the neutral,sheath,and the shield regions of a virtual cathode formed by the secondary electrons near the workpiece surface,and finally are absorbed by the surface of the workpiece with negative bias in ECR microwave plasma.The nonlinear cylinder Poisson equations is solved successfully with “trial” method,and the smoothed and self limits spectrum of potential and distributions of energy and angle at the surface of workpiece are obtained.The magnetic filed,gas pressure and secondary effects on the potential of sheath are also discussed.</p> <br/>Acta Physica Sinica. 1997 46(12): 2376-2383. Published 1997-06-05 NUMERICAL STUDY OF ION TRANSPORT IN ECR MICROWAVE PLASMA WITH A CYLINDER MODEL GONG YE, WEN XIAO-JUN, ZHANG PENG-YUN, DENG XIN-LU 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2376-2383. article doi:10.7498/aps.46.2376 10.7498/aps.46.2376 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2376 2376-2383 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2384 Author(s): ZENG GUI-HUA, XU ZHI-ZHAN <br/><p>A new type of accelerator scheme is proposed, which employs the combination of an intense laser field and a self-generated magnetic field. Theoretical analyses and numerical evalutions are performed.Results show that an electron injected can be efficiently accelerated in the combined field under the cyclotron resonance condition.</p> <br/>Acta Physica Sinica. 1997 46(12): 2384-2388. Published 1997-06-05 Author(s): ZENG GUI-HUA, XU ZHI-ZHAN <br/><p>A new type of accelerator scheme is proposed, which employs the combination of an intense laser field and a self-generated magnetic field. Theoretical analyses and numerical evalutions are performed.Results show that an electron injected can be efficiently accelerated in the combined field under the cyclotron resonance condition.</p> <br/>Acta Physica Sinica. 1997 46(12): 2384-2388. Published 1997-06-05 A NEW TYPE ACCELERATOR ZENG GUI-HUA, XU ZHI-ZHAN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2384-2388. article doi:10.7498/aps.46.2384 10.7498/aps.46.2384 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2384 2384-2388 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2389 Author(s): XU MAN-HUA, WEI MING-JIAN <br/><p>In measuring the particle-size distribution by small angle X-ray scattering the particle form must be known.In general the form of particles considered to be spherical ,but in practice, the form of particles was very complexity.We statistcally separate the forms of particles into sphere-like; flat-like and rod-like ones. The general method for calculating the form scattering function has been given, and we have calculated the form scattering function for sphere-like particles, and given an adjustable parameter δ that can be used in general analysis.</p> <br/>Acta Physica Sinica. 1997 46(12): 2389-2393. Published 1997-06-05 Author(s): XU MAN-HUA, WEI MING-JIAN <br/><p>In measuring the particle-size distribution by small angle X-ray scattering the particle form must be known.In general the form of particles considered to be spherical ,but in practice, the form of particles was very complexity.We statistcally separate the forms of particles into sphere-like; flat-like and rod-like ones. The general method for calculating the form scattering function has been given, and we have calculated the form scattering function for sphere-like particles, and given an adjustable parameter δ that can be used in general analysis.</p> <br/>Acta Physica Sinica. 1997 46(12): 2389-2393. Published 1997-06-05 A METHOD FOR CALCULATING THE FORM SCATTERING FUNCTION OF NONSPHERICAL PARTICLE XU MAN-HUA, WEI MING-JIAN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2389-2393. article doi:10.7498/aps.46.2389 10.7498/aps.46.2389 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2389 2389-2393 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2394 Author(s): YU BAO-LONG, ZHU CONG-SHAN, GAN FU-XI <br/><p>We have measured the thermo-optic coefficient dn/dT and the thermal-induced index of refraction n２ of PbS nanoparticles in organosol with the single beam Z-scan technique. The optical limiting properties of PbS nanoparticles were studied under continuous wave laser illumination. Finally, the results obtained were analyzed and discussed.</p> <br/>Acta Physica Sinica. 1997 46(12): 2394-2400. Published 1997-06-05 Author(s): YU BAO-LONG, ZHU CONG-SHAN, GAN FU-XI <br/><p>We have measured the thermo-optic coefficient dn/dT and the thermal-induced index of refraction n２ of PbS nanoparticles in organosol with the single beam Z-scan technique. The optical limiting properties of PbS nanoparticles were studied under continuous wave laser illumination. Finally, the results obtained were analyzed and discussed.</p> <br/>Acta Physica Sinica. 1997 46(12): 2394-2400. Published 1997-06-05 MEASUREMENT ON THE THERMO OPTIC COEFFICIENT dn/dT OF SEMICONDUCTOR PbS NANOPARTICLES AND THE STUDY ON THEIR OPTICAL LIMITING EFFECTS YU BAO-LONG, ZHU CONG-SHAN, GAN FU-XI 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2394-2400. article doi:10.7498/aps.46.2394 10.7498/aps.46.2394 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2394 2394-2400 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2401 Author(s): HUANG HU-QING, LI FEI <br/><p>In this paper we use the method of steepest descent (also called saddlepoint method) to evaluate bit-error probability of the ultra-long distance optical soliton communication systems with lumped amplifiers and then compare these results with the Gaussian approximation.</p> <br/>Acta Physica Sinica. 1997 46(12): 2401-2407. Published 1997-06-05 Author(s): HUANG HU-QING, LI FEI <br/><p>In this paper we use the method of steepest descent (also called saddlepoint method) to evaluate bit-error probability of the ultra-long distance optical soliton communication systems with lumped amplifiers and then compare these results with the Gaussian approximation.</p> <br/>Acta Physica Sinica. 1997 46(12): 2401-2407. Published 1997-06-05 A NEW METHOD FOR CALCULATING BIT ERROR PROBABILITY IN OPTICAL SOLITON COMMUNICATION SYSTEM HUANG HU-QING, LI FEI 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2401-2407. article doi:10.7498/aps.46.2401 10.7498/aps.46.2401 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2401 2401-2407 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2408 Author(s): LIU JUN-MIN <br/><p>With forced-mode measurements,the dependence of internal friction on the rate of change of temperature and vibration frequency in MnCu alloy undergoing thermoelastic martensitic phase-transition was investigated.Based on the results of the experiment a new empirical relationship was proposed-.</p> <br/>Acta Physica Sinica. 1997 46(12): 2408-2417. Published 1997-06-05 Author(s): LIU JUN-MIN <br/><p>With forced-mode measurements,the dependence of internal friction on the rate of change of temperature and vibration frequency in MnCu alloy undergoing thermoelastic martensitic phase-transition was investigated.Based on the results of the experiment a new empirical relationship was proposed-.</p> <br/>Acta Physica Sinica. 1997 46(12): 2408-2417. Published 1997-06-05 NONLINEAR INTERNAL FRICTION BEHAVIOR IN MnCu ALLOY DURING THERMOELASTIC MARTENSITIC TRANSITION LIU JUN-MIN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2408-2417. article doi:10.7498/aps.46.2408 10.7498/aps.46.2408 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2408 2408-2417 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2418 Author(s): ZHUANG JUN, LIU LEI <br/><p>Self-diffusion of Ag/Ag (100) is investigated by molecular dynamics with the semiempirical surface-embedded-atom method (SEAM) potential. Many diffusion mechanisms, such as hopping, simple exchange, complicated exchange and a new mechanism named multiple-hopping are observed. Another model for explaining the complicated exchange mechanism is given. From Arrhenius- behavior of the adatom and the statistical results, we obtain the active energies for simple- exchange and hopping mechanisms respectively, they are 0.39 and 0.47eV.</p> <br/>Acta Physica Sinica. 1997 46(12): 2418-2425. Published 1997-06-05 Author(s): ZHUANG JUN, LIU LEI <br/><p>Self-diffusion of Ag/Ag (100) is investigated by molecular dynamics with the semiempirical surface-embedded-atom method (SEAM) potential. Many diffusion mechanisms, such as hopping, simple exchange, complicated exchange and a new mechanism named multiple-hopping are observed. Another model for explaining the complicated exchange mechanism is given. From Arrhenius- behavior of the adatom and the statistical results, we obtain the active energies for simple- exchange and hopping mechanisms respectively, they are 0.39 and 0.47eV.</p> <br/>Acta Physica Sinica. 1997 46(12): 2418-2425. Published 1997-06-05 A MOLECULAR DYNAMICS STUDY OF SELF-DIFFUSION ON Ag(100) SURFACE ZHUANG JUN, LIU LEI 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2418-2425. article doi:10.7498/aps.46.2418 10.7498/aps.46.2418 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2418 2418-2425 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2426 Author(s): DUAN SU-QING, LIU SHAO-JUN, MA BEN-KUN <br/><p>Electronic structure calculations using the tight-binding linear muffin-tin orbital (TB-LMTO) method have been performed for two cobalt titanides, viz. Co3Ti and CoTi. The ab initio curves of cohesive energies vs lattice constants and density of states(DOS) have been obtained. The lattice constants and bulk moduli are in good agreement with the experimental values.</p> <br/>Acta Physica Sinica. 1997 46(12): 2426-2430. Published 1997-06-05 Author(s): DUAN SU-QING, LIU SHAO-JUN, MA BEN-KUN <br/><p>Electronic structure calculations using the tight-binding linear muffin-tin orbital (TB-LMTO) method have been performed for two cobalt titanides, viz. Co3Ti and CoTi. The ab initio curves of cohesive energies vs lattice constants and density of states(DOS) have been obtained. The lattice constants and bulk moduli are in good agreement with the experimental values.</p> <br/>Acta Physica Sinica. 1997 46(12): 2426-2430. Published 1997-06-05 COHESIVE ENERGIES AND ELECTRONIC STRUCTURES OF Co3Ti AND CoTi DUAN SU-QING, LIU SHAO-JUN, MA BEN-KUN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2426-2430. article doi:10.7498/aps.46.2426 10.7498/aps.46.2426 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2426 2426-2430 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2431 Author(s): LIANG FANG-YING, JIANG WEN-ZHI <br/><p>Vortex motion in high-temperature superconductors is studied starting from a variant of the time-dependent Ginzberg-Landau(TDGL) equations,in which the order-parameter relaxation time is taken to be complex.Using Lawrence-Doniach model and considering a TDGL model modified to take into account the Hall- effect,-we have evaluated and discussed the sign change of the Hall angle and anomalous Hall effect.The results are discussed in light of rather puzzling sign change of the Hall effect which has been observed in the mixed state of the high-temperature Superconductors.</p> <br/>Acta Physica Sinica. 1997 46(12): 2431-2441. Published 1997-06-05 Author(s): LIANG FANG-YING, JIANG WEN-ZHI <br/><p>Vortex motion in high-temperature superconductors is studied starting from a variant of the time-dependent Ginzberg-Landau(TDGL) equations,in which the order-parameter relaxation time is taken to be complex.Using Lawrence-Doniach model and considering a TDGL model modified to take into account the Hall- effect,-we have evaluated and discussed the sign change of the Hall angle and anomalous Hall effect.The results are discussed in light of rather puzzling sign change of the Hall effect which has been observed in the mixed state of the high-temperature Superconductors.</p> <br/>Acta Physica Sinica. 1997 46(12): 2431-2441. Published 1997-06-05 VORTEX MOTION AND THE HALL EFFECT IN HIGH TEMPERATURE SUPERCONDUCTORS——A TIME DEPENDANT GINZBURG LANDAU THEORY APPROACH LIANG FANG-YING, JIANG WEN-ZHI 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2431-2441. article doi:10.7498/aps.46.2431 10.7498/aps.46.2431 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2431 2431-2441 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2442 Author(s): SUI YU, SU WEN-HUI, ZHENG FAN-LEI, XU DA-PENG <br/><p>NiFe2O4 nanoparticles with on average grain size of 12nm were compacted into nanosolids under the pressure of 0.0—4.5GPa.The M?ssbauer spectra of NiFe2O4 nanosolids at room temperature and low temperatures show that high pressure has a strong influence on the magnetic interaction and interface atomic state inside the nanosolid,though the crystal structure and average grain size of nanosolid do not change under high pressure.Under high pressure,the superparamagnetic relaxation of NiFe2O4 nanosolid is suppressed obviously by the enhancement of the interparticle magnetic dipole interaction and the superexchange interaction among the interface ions in the nanosolid,and the magnetic anisotropy of it is also weakened by the interparticle magnetic coupling in it.At the same time,the symmetry and the degree of short-range order of the polyhedrons are raised gradually with the increase of pressure,and then the atomic structure in the surface and interface zone of NiFe2O4 nanosolid shows a tendency to change into the grain boundary structure of common polycrystalline solid with large grain size.</p> <br/>Acta Physica Sinica. 1997 46(12): 2442-2453. Published 1997-06-05 Author(s): SUI YU, SU WEN-HUI, ZHENG FAN-LEI, XU DA-PENG <br/><p>NiFe2O4 nanoparticles with on average grain size of 12nm were compacted into nanosolids under the pressure of 0.0—4.5GPa.The M?ssbauer spectra of NiFe2O4 nanosolids at room temperature and low temperatures show that high pressure has a strong influence on the magnetic interaction and interface atomic state inside the nanosolid,though the crystal structure and average grain size of nanosolid do not change under high pressure.Under high pressure,the superparamagnetic relaxation of NiFe2O4 nanosolid is suppressed obviously by the enhancement of the interparticle magnetic dipole interaction and the superexchange interaction among the interface ions in the nanosolid,and the magnetic anisotropy of it is also weakened by the interparticle magnetic coupling in it.At the same time,the symmetry and the degree of short-range order of the polyhedrons are raised gradually with the increase of pressure,and then the atomic structure in the surface and interface zone of NiFe2O4 nanosolid shows a tendency to change into the grain boundary structure of common polycrystalline solid with large grain size.</p> <br/>Acta Physica Sinica. 1997 46(12): 2442-2453. Published 1997-06-05 M?SSBAUER SPECTROSCOPY STUDY OF NiFe2O4 NANOSOLID COMPACTED UNDER HIGH PRESSURE SUI YU, SU WEN-HUI, ZHENG FAN-LEI, XU DA-PENG 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2442-2453. article doi:10.7498/aps.46.2442 10.7498/aps.46.2442 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2442 2442-2453 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2454 Author(s): FENG YAN, CHEN XIAO-BO, HAO ZHAO, ZHANG GUANG-YIN, SONG FENG, LI MEI-XIAN <br/><p>Ｕｎｄｅｒ ｔｈｅ ｐｕｍｐｉｎｇ ｏｆ ａ ９７０ｎｍ ｄｉｏｄｅ ｌａｓｅｒ ｔｈｅ Ｔｍ3+ ａｎｄ Ｙｂ3+ ｃｏｄｏｐｅｄ ＺＢＬＡＮ ｇｌａｓｓ ｅｍｉｔｓ ｓｔｒｏｎｇ ｂｌｕｅ ａｎｄ ｒｅｄ ｕｐｃｏｎｖｅｒｔｅｄ ｌｉｇｈｔ．Ｔｈｅ ｌｕｍｉｎｅｓｃｅｎｃｅ ｏｆ 1Ｇ4 and 3Ｆ4 ｌｅｖｅｌｓ ｒｅｓｕｌｔｓ ｆｒｏｍ ｔｈｅ ｃｏｎｓｅ-ｑｕｅｎｔｉａｌ Ｙｂ3+ ｔｏ Ｔｍ3+ ｅｎｅｒｇｙ ｔｒａｎｓｆｅｒ，ｗｈｅｒｅａｓ ｔｈｅ 1Ｄ２ ｌｅｖｅｌ ｉｓ ｅｘｃｉｔｅｄ ｂｙ ａ ｆｕｒｔｈｅｒ ｃｒｏｓｓ ｅｎｅｒｇｙ ｔｒａｎｓｆｅｒ ａｍｏｎｇ Ｔｍ3+ ｉｏｎｓ.Ｔｈｅ ｃｒｏｓｓ-ｒｅｌａｘａｔｉｏｎｓ ｏｆ Ｔｍ3+ ｉｏｎｓ ａｎｄ ｂａｃｋ ｅｎｅｒｇｙ ｔｒａｎｓｆｅｒ ｏｆ Ｔｍ3+ ｔｏ Ｙｂ3+ ｗａｓ ａｌｓｏ ｏｂｓｅｒｖｅｄ．Ｆｕｒｔｈｅｒｍｏｒｅ，ａｆｔｅｒ ａｎ ｉｎｖｅｓｔｉｇａｔｉｏｎ ｏｆ ｔｈｅ ｓｐｅｃｉａｌ ｃｈａｒａｃｔｅｒｉｓｔｉｃ ｏｆ Ｔｍ3+ ａｎｄ Ｙｂ3+ ｃｏｄｏｐｅｄ ｓｙｓｔｅｍ ｗｅ ｔｈｉｎｋ ｔｈａｔ ｔｈｉｓ ｓｙｓｔｅｍ ｉｓ ａｄｖａｎｔａｇｅｏｕｓ ｔｏ ｔｈｅ ｉｍｐｒｏｖｅｍｅｎｔ ｏｆ ｔｈｅ ｎｅｔ ｅｆｆｉｃｉｅｎｃｙ ｏｆ ｕｐｃｏｎｖｅｒｓｉｏｎ ｌｕｍｉｎｅｓｃｅ.</p> <br/>Acta Physica Sinica. 1997 46(12): 2454-2460. Published 1997-06-05 Author(s): FENG YAN, CHEN XIAO-BO, HAO ZHAO, ZHANG GUANG-YIN, SONG FENG, LI MEI-XIAN <br/><p>Ｕｎｄｅｒ ｔｈｅ ｐｕｍｐｉｎｇ ｏｆ ａ ９７０ｎｍ ｄｉｏｄｅ ｌａｓｅｒ ｔｈｅ Ｔｍ3+ ａｎｄ Ｙｂ3+ ｃｏｄｏｐｅｄ ＺＢＬＡＮ ｇｌａｓｓ ｅｍｉｔｓ ｓｔｒｏｎｇ ｂｌｕｅ ａｎｄ ｒｅｄ ｕｐｃｏｎｖｅｒｔｅｄ ｌｉｇｈｔ．Ｔｈｅ ｌｕｍｉｎｅｓｃｅｎｃｅ ｏｆ 1Ｇ4 and 3Ｆ4 ｌｅｖｅｌｓ ｒｅｓｕｌｔｓ ｆｒｏｍ ｔｈｅ ｃｏｎｓｅ-ｑｕｅｎｔｉａｌ Ｙｂ3+ ｔｏ Ｔｍ3+ ｅｎｅｒｇｙ ｔｒａｎｓｆｅｒ，ｗｈｅｒｅａｓ ｔｈｅ 1Ｄ２ ｌｅｖｅｌ ｉｓ ｅｘｃｉｔｅｄ ｂｙ ａ ｆｕｒｔｈｅｒ ｃｒｏｓｓ ｅｎｅｒｇｙ ｔｒａｎｓｆｅｒ ａｍｏｎｇ Ｔｍ3+ ｉｏｎｓ.Ｔｈｅ ｃｒｏｓｓ-ｒｅｌａｘａｔｉｏｎｓ ｏｆ Ｔｍ3+ ｉｏｎｓ ａｎｄ ｂａｃｋ ｅｎｅｒｇｙ ｔｒａｎｓｆｅｒ ｏｆ Ｔｍ3+ ｔｏ Ｙｂ3+ ｗａｓ ａｌｓｏ ｏｂｓｅｒｖｅｄ．Ｆｕｒｔｈｅｒｍｏｒｅ，ａｆｔｅｒ ａｎ ｉｎｖｅｓｔｉｇａｔｉｏｎ ｏｆ ｔｈｅ ｓｐｅｃｉａｌ ｃｈａｒａｃｔｅｒｉｓｔｉｃ ｏｆ Ｔｍ3+ ａｎｄ Ｙｂ3+ ｃｏｄｏｐｅｄ ｓｙｓｔｅｍ ｗｅ ｔｈｉｎｋ ｔｈａｔ ｔｈｉｓ ｓｙｓｔｅｍ ｉｓ ａｄｖａｎｔａｇｅｏｕｓ ｔｏ ｔｈｅ ｉｍｐｒｏｖｅｍｅｎｔ ｏｆ ｔｈｅ ｎｅｔ ｅｆｆｉｃｉｅｎｃｙ ｏｆ ｕｐｃｏｎｖｅｒｓｉｏｎ ｌｕｍｉｎｅｓｃｅ.</p> <br/>Acta Physica Sinica. 1997 46(12): 2454-2460. Published 1997-06-05 ＥＮＥＲＧＹ ＴＲＡＮＳＦＥＲ ＡＮＤ ＵＰＣＯＮＶＥＲＳＩＯＮ ＩＮ Ｔｍ3+ ＡＮＤ Ｙｂ3+ ＣＯＤＯＰＥＤ ＺＢＬＡＮ ＧＬＡＳＳ FENG YAN, CHEN XIAO-BO, HAO ZHAO, ZHANG GUANG-YIN, SONG FENG, LI MEI-XIAN 1997-06-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1997 46(12): 2454-2460. article doi:10.7498/aps.46.2454 10.7498/aps.46.2454 Acta Physica Sinica 46 12 1997-06-05 //www.getgobooth.com/en/article/doi/10.7498/aps.46.2454 2454-2460

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