//www.getgobooth.com/ 必威体育下载 daily 15 2024-09-23 16:10:14 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-09-23 16:10:14 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.34.289 Author(s): DING E-JIANG, HUANG ZU-QIA <br/><p>The singular perturbation solution of Boltzmann equation for the plane geometry is generalized to the spherical case. Based on a specific model, some characteristics in the initial stage of relaxation process are discussed.</p> <br/>Acta Physica Sinica. 1985 34(3): 289-297. Published 2005-03-28 Author(s): DING E-JIANG, HUANG ZU-QIA <br/><p>The singular perturbation solution of Boltzmann equation for the plane geometry is generalized to the spherical case. Based on a specific model, some characteristics in the initial stage of relaxation process are discussed.</p> <br/>Acta Physica Sinica. 1985 34(3): 289-297. Published 2005-03-28 A KIND OF RELAXATION OF RAREFIED GASES IN INFINITE SPACE WITH SPHERICAL SYMMETRY DING E-JIANG, HUANG ZU-QIA 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 289-297. article doi:10.7498/aps.34.289 10.7498/aps.34.289 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.289 289-297 //www.getgobooth.com/en/article/doi/10.7498/aps.34.298 Author(s): ZHANG CHENG-FU, KE FU-JIU <br/><p>The paper presents a nonlinear MHD equation describing 2-D inhomogeneous magnetized plasma. Then a 2-D solitary vortex solution was given. Its structure is similar to the solution obtained in papers [2, 3], but it differs from the latter in several aspects. There is no restriction on the values of vortex speeds and the solitary waves can propagate in any direction in the plane with magnetic field B as its normal. The plasma is adhered to the vortex and moving along with it across B. This implies that the existence of solitary vortices is connected with anomalous transport of plasma.</p> <br/>Acta Physica Sinica. 1985 34(3): 298-305. Published 2005-03-28 Author(s): ZHANG CHENG-FU, KE FU-JIU <br/><p>The paper presents a nonlinear MHD equation describing 2-D inhomogeneous magnetized plasma. Then a 2-D solitary vortex solution was given. Its structure is similar to the solution obtained in papers [2, 3], but it differs from the latter in several aspects. There is no restriction on the values of vortex speeds and the solitary waves can propagate in any direction in the plane with magnetic field B as its normal. The plasma is adhered to the vortex and moving along with it across B. This implies that the existence of solitary vortices is connected with anomalous transport of plasma.</p> <br/>Acta Physica Sinica. 1985 34(3): 298-305. Published 2005-03-28 ON THE TWO DIMENSIONAL SOLITARY DRIFT WAVES IN THE INHOMOGENEOUS MAGNETIZED PLASMA ZHANG CHENG-FU, KE FU-JIU 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 298-305. article doi:10.7498/aps.34.298 10.7498/aps.34.298 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.298 298-305 //www.getgobooth.com/en/article/doi/10.7498/aps.34.306 Author(s): LIN RUI-YAN, LIU MIN, TSUNEO AMANO <br/><p>Combining the MHD equilibrium equation of axisymmetric plasma with a flux sur-face-averaged description of the plasma, the evolutional configurations of adiabatic com-pressional plasma equilibria are computed. The results are consistent well with the analytic scaling laws given by Furth and Yoshikawa. Some results of the configuration evolu-tion for two types of compressional plasma are presented.</p> <br/>Acta Physica Sinica. 1985 34(3): 306-313. Published 2005-03-28 Author(s): LIN RUI-YAN, LIU MIN, TSUNEO AMANO <br/><p>Combining the MHD equilibrium equation of axisymmetric plasma with a flux sur-face-averaged description of the plasma, the evolutional configurations of adiabatic com-pressional plasma equilibria are computed. The results are consistent well with the analytic scaling laws given by Furth and Yoshikawa. Some results of the configuration evolu-tion for two types of compressional plasma are presented.</p> <br/>Acta Physica Sinica. 1985 34(3): 306-313. Published 2005-03-28 ADIABATIC EVOLUTION OF MHD EQUILIBRIUM CONFIGURATIONS OF PLASMA LIN RUI-YAN, LIU MIN, TSUNEO AMANO 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 306-313. article doi:10.7498/aps.34.306 10.7498/aps.34.306 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.306 306-313 //www.getgobooth.com/en/article/doi/10.7498/aps.34.314 Author(s): AN ZHI-GANG, P. H. Diamond <br/><p>Electron conduction losses due to magnetic flutter produced by resistive interchange instabilities and the resulted confinement deterioration mechanism are investigated analytically. Using approximate solutions of MHD equations for even and odd potential parities, the potential and magnetic perturbation levels at saturation are estimated. These results are used to calculate the stochastic magnetic field diffusion coefficients. An expression for the anomalous electron thermal conductivity is then derived for collision-less and collisional regimes. Scaling laws for energy confinement are infered therefrom.</p> <br/>Acta Physica Sinica. 1985 34(3): 314-321. Published 2005-03-28 Author(s): AN ZHI-GANG, P. H. Diamond <br/><p>Electron conduction losses due to magnetic flutter produced by resistive interchange instabilities and the resulted confinement deterioration mechanism are investigated analytically. Using approximate solutions of MHD equations for even and odd potential parities, the potential and magnetic perturbation levels at saturation are estimated. These results are used to calculate the stochastic magnetic field diffusion coefficients. An expression for the anomalous electron thermal conductivity is then derived for collision-less and collisional regimes. Scaling laws for energy confinement are infered therefrom.</p> <br/>Acta Physica Sinica. 1985 34(3): 314-321. Published 2005-03-28 EFFECTS OF RESISTIVE INTERCHANGE INSTABILITIES ON ENERGY CONFINEMENT IN REVERSED-FIELD PINCH AN ZHI-GANG, P. H. Diamond 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 314-321. article doi:10.7498/aps.34.314 10.7498/aps.34.314 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.314 314-321 //www.getgobooth.com/en/article/doi/10.7498/aps.34.322 Author(s): XIA MENG-FEN, QIU YUN-QING <br/><p>When the amplitude of waves exceeds a certain threshold, the stochasticity occurs both in the velocity space and configuration space. It is found that spatial diffusion and directional flow, which are much stronger than the classical processes, may be driven by waves in the k×B0 direction. In toroidal plasma, the spatial diffusion and bootstrap current, which are much stronger than the neoclassical processes, may be produced by the wave-driven velocity diffusion effect. The wave-enhanced bootstrap current is available for current drive.</p> <br/>Acta Physica Sinica. 1985 34(3): 322-331. Published 2005-03-28 Author(s): XIA MENG-FEN, QIU YUN-QING <br/><p>When the amplitude of waves exceeds a certain threshold, the stochasticity occurs both in the velocity space and configuration space. It is found that spatial diffusion and directional flow, which are much stronger than the classical processes, may be driven by waves in the k×B0 direction. In toroidal plasma, the spatial diffusion and bootstrap current, which are much stronger than the neoclassical processes, may be produced by the wave-driven velocity diffusion effect. The wave-enhanced bootstrap current is available for current drive.</p> <br/>Acta Physica Sinica. 1985 34(3): 322-331. Published 2005-03-28 SPATIAL DIFFUSION DRIVEN BY ELECTROSTATIC WAVES XIA MENG-FEN, QIU YUN-QING 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 322-331. article doi:10.7498/aps.34.322 10.7498/aps.34.322 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.322 322-331 //www.getgobooth.com/en/article/doi/10.7498/aps.34.332 Author(s): WU DING-FEN, WANG DE-NING <br/><p>An inverse proportionality between the specific contact resistance ρc of n-type GaAs and its carrier concentration ND has been shown by a lot of experimental facts. In this paper, a comment is made on the various viewpoints about this phenomenon in the literatures and their shortages are pointed out as well. According to the band structure of ohmic contact, a new model, assuming that ρc consists of two parts (ρ(c1) and ρ(c2)), is put forward. ρ(c1) occurs between the contact metal and its underlying highly doped semiconductor layer (NDc) after alloying. ρc2 is brought about by a barrier appeared due to the concentration difference between the NDc and the active layer ND. If the alloying process is optimized and thus the NDc is very high, then ρ(c1) is very small and ρ(c2) gives the main contribution to ρc. In this case an inverse proportionality between ρc and NDcan be found, if NDc (Nc is the effective state density). When ND&lt; Nc, ρ(c2) can be neglected due to the disappearance of the barrier. In this case, ρc is determined by ρc1, which should depend only on NDc. Based on the above description, a theoretical deduction was carried out and the result not only can explain the experimental data of n-type GaAs ohmic contact very well, but also the experimental facts of p-type Si ohmic contact presented in the literatures. We believe that this model can also be extended to the case of other III-V compound semiconductors, such as p-type GaAs and P-type InP etc.</p> <br/>Acta Physica Sinica. 1985 34(3): 332-340. Published 2005-03-28 Author(s): WU DING-FEN, WANG DE-NING <br/><p>An inverse proportionality between the specific contact resistance ρc of n-type GaAs and its carrier concentration ND has been shown by a lot of experimental facts. In this paper, a comment is made on the various viewpoints about this phenomenon in the literatures and their shortages are pointed out as well. According to the band structure of ohmic contact, a new model, assuming that ρc consists of two parts (ρ(c1) and ρ(c2)), is put forward. ρ(c1) occurs between the contact metal and its underlying highly doped semiconductor layer (NDc) after alloying. ρc2 is brought about by a barrier appeared due to the concentration difference between the NDc and the active layer ND. If the alloying process is optimized and thus the NDc is very high, then ρ(c1) is very small and ρ(c2) gives the main contribution to ρc. In this case an inverse proportionality between ρc and NDcan be found, if NDc (Nc is the effective state density). When ND&lt; Nc, ρ(c2) can be neglected due to the disappearance of the barrier. In this case, ρc is determined by ρc1, which should depend only on NDc. Based on the above description, a theoretical deduction was carried out and the result not only can explain the experimental data of n-type GaAs ohmic contact very well, but also the experimental facts of p-type Si ohmic contact presented in the literatures. We believe that this model can also be extended to the case of other III-V compound semiconductors, such as p-type GaAs and P-type InP etc.</p> <br/>Acta Physica Sinica. 1985 34(3): 332-340. Published 2005-03-28 A MODEL OF OHMIC CONTACT OF GaAs AND OTHER SEMICONDUCTOR WU DING-FEN, WANG DE-NING 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 332-340. article doi:10.7498/aps.34.332 10.7498/aps.34.332 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.332 332-340 //www.getgobooth.com/en/article/doi/10.7498/aps.34.341 Author(s): ZHUANG CHENG-QUN, FENG YI-QING, JIN XIAO-FENG, WANG XUN, CAI XIAN-E, YU LIAN-MIN <br/><p>The thermal desorption spectra of propene and oxygen adsorbed on blue tungsten oxide WO2.90 have been measured by means of flash heating the sample in ultra high vacuum. It has been discovered that at room temperature only one adsorption state of propene on blue tungsten oxide surface exists, which corresponds to a desorption peak at the temperature around 100℃ appeared in the thermal desorption spectra. The desor- ption parameters determined by the experiment are: n=l (first order desorption) and the activation energy of desorption Ed=10.1 kcal/mol. The probability of forming stable adsorption state of propene on blue tungsten oxide decreases as the sample temperature increases. At room temperature, the blue tungsten oxide doesn't interact with oxygen significantly. But after raising the temperature to above 300℃, WO2.90 is oxidized into WO3 accompanying with a strong adsorption of oxygen. This implies that the blue tungsten oxide could be used as a promising oxygen getter in the vacuum valves.</p> <br/>Acta Physica Sinica. 1985 34(3): 341-347. Published 2005-03-28 Author(s): ZHUANG CHENG-QUN, FENG YI-QING, JIN XIAO-FENG, WANG XUN, CAI XIAN-E, YU LIAN-MIN <br/><p>The thermal desorption spectra of propene and oxygen adsorbed on blue tungsten oxide WO2.90 have been measured by means of flash heating the sample in ultra high vacuum. It has been discovered that at room temperature only one adsorption state of propene on blue tungsten oxide surface exists, which corresponds to a desorption peak at the temperature around 100℃ appeared in the thermal desorption spectra. The desor- ption parameters determined by the experiment are: n=l (first order desorption) and the activation energy of desorption Ed=10.1 kcal/mol. The probability of forming stable adsorption state of propene on blue tungsten oxide decreases as the sample temperature increases. At room temperature, the blue tungsten oxide doesn't interact with oxygen significantly. But after raising the temperature to above 300℃, WO2.90 is oxidized into WO3 accompanying with a strong adsorption of oxygen. This implies that the blue tungsten oxide could be used as a promising oxygen getter in the vacuum valves.</p> <br/>Acta Physica Sinica. 1985 34(3): 341-347. Published 2005-03-28 THERMAL DESORPTION SPECTRA OF PROPENE AND OXYGEN ADSORBED ON BLUE TUNGSTEN OXIDE ZHUANG CHENG-QUN, FENG YI-QING, JIN XIAO-FENG, WANG XUN, CAI XIAN-E, YU LIAN-MIN 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 341-347. article doi:10.7498/aps.34.341 10.7498/aps.34.341 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.341 341-347 //www.getgobooth.com/en/article/doi/10.7498/aps.34.348 Author(s): XIMEN JI-YE, YAN JI-WEN, HUANG XU <br/><p>It is well known from electron optics that spherical aberration and defocus modify the diffraction plane wave function by a phase shifty and the coherent amplitude and phase-contrast transfer functions are cosy and siny. Consequently, the inverse Fourier transforms of cosy and siny are the real and imaginary parts of impulse response. The locations of the zeros and extrema of the amplitude- and phase-contrast transfer functions are presented. These zeros and extrema devide the diffraction plane into a series of annular regions. When the value of the dimensionless defocus is selected as △=N1/2 (N is a positive integer), the integrals of transfer function over corresponding annular regions are equal. Equivalently, their contributions to the central value of the impulse response are of the same value. The conditions for maximizing or minimizing the integrals of cosy on siny (i.e. maximizing or minimizing the central value or intensity of impulse response) has been suggested. In the present paper, the condition for the mean-square optimum approximation of impulse response with the ideal Airy distribution has also been discussed.</p> <br/>Acta Physica Sinica. 1985 34(3): 348-358. Published 2005-03-28 Author(s): XIMEN JI-YE, YAN JI-WEN, HUANG XU <br/><p>It is well known from electron optics that spherical aberration and defocus modify the diffraction plane wave function by a phase shifty and the coherent amplitude and phase-contrast transfer functions are cosy and siny. Consequently, the inverse Fourier transforms of cosy and siny are the real and imaginary parts of impulse response. The locations of the zeros and extrema of the amplitude- and phase-contrast transfer functions are presented. These zeros and extrema devide the diffraction plane into a series of annular regions. When the value of the dimensionless defocus is selected as △=N1/2 (N is a positive integer), the integrals of transfer function over corresponding annular regions are equal. Equivalently, their contributions to the central value of the impulse response are of the same value. The conditions for maximizing or minimizing the integrals of cosy on siny (i.e. maximizing or minimizing the central value or intensity of impulse response) has been suggested. In the present paper, the condition for the mean-square optimum approximation of impulse response with the ideal Airy distribution has also been discussed.</p> <br/>Acta Physica Sinica. 1985 34(3): 348-358. Published 2005-03-28 ON ELECTRON OPTICAL TRANSFER FUNCTION AND IMPULSE RESPONSE IN THE PRESENCE OF SPHERICAL ABERRATION AND DEFOCUS XIMEN JI-YE, YAN JI-WEN, HUANG XU 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 348-358. article doi:10.7498/aps.34.348 10.7498/aps.34.348 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.348 348-358 //www.getgobooth.com/en/article/doi/10.7498/aps.34.359 Author(s): SUN TAO-HENG, J. A. KASH, E. L. HAHN <br/><p>The observation of optical rotary echos by Stark switching in infra-red region is reported. Optical rotary echo is a nutation echo and has a long relaxation time which makes it particularly useful in the study of relaxation process. An improvment of experimental condition has been made and a theoretical calculation of rotary echo is presented.</p> <br/>Acta Physica Sinica. 1985 34(3): 359-367. Published 2005-03-28 Author(s): SUN TAO-HENG, J. A. KASH, E. L. HAHN <br/><p>The observation of optical rotary echos by Stark switching in infra-red region is reported. Optical rotary echo is a nutation echo and has a long relaxation time which makes it particularly useful in the study of relaxation process. An improvment of experimental condition has been made and a theoretical calculation of rotary echo is presented.</p> <br/>Acta Physica Sinica. 1985 34(3): 359-367. Published 2005-03-28 THE CALCULATION AND OBSERVATION OF OPTICAL ROTARY ECHOS SUN TAO-HENG, J. A. KASH, E. L. HAHN 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 359-367. article doi:10.7498/aps.34.359 10.7498/aps.34.359 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.359 359-367 //www.getgobooth.com/en/article/doi/10.7498/aps.34.368 Author(s): SUN FENG-JIU <br/><p>This paper discusses the relationship between operator methods and matrix methods in optics. Based on the definition of optical variable operators and the hypothesis that optical operators of linear optical systems are unitary, the relation equation dealing with the relationship between operator methods and matrix methods in optics has been obtained from the general property of linear systems. For a given optical system, its optical operator can be derived from its optical matrix by solving the relation equation. And if the optical operator of a system is given, its optical matrix can also be derived from that equation. Thus the equivalency between operator methods and matrix methods in optics is demonstrated. Finally, the physical significance of the optical operator h has been pointed out.</p> <br/>Acta Physica Sinica. 1985 34(3): 368-376. Published 2005-03-28 Author(s): SUN FENG-JIU <br/><p>This paper discusses the relationship between operator methods and matrix methods in optics. Based on the definition of optical variable operators and the hypothesis that optical operators of linear optical systems are unitary, the relation equation dealing with the relationship between operator methods and matrix methods in optics has been obtained from the general property of linear systems. For a given optical system, its optical operator can be derived from its optical matrix by solving the relation equation. And if the optical operator of a system is given, its optical matrix can also be derived from that equation. Thus the equivalency between operator methods and matrix methods in optics is demonstrated. Finally, the physical significance of the optical operator h has been pointed out.</p> <br/>Acta Physica Sinica. 1985 34(3): 368-376. Published 2005-03-28 RELATIONSHIP BETWEEN FORMAL QUANTUM-OPERATOR METHODS AND MATRIX METHODS IN OPTICS SUN FENG-JIU 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 368-376. article doi:10.7498/aps.34.368 10.7498/aps.34.368 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.368 368-376 //www.getgobooth.com/en/article/doi/10.7498/aps.34.377 Author(s): CHEN JIN-CHANG, HUANG YI-SEN, WEI PEI-ZAI <br/><p>Etch pits on (100) and (001) surface of KDP crystals have been revealed by chemical etchant and optical observations. Based on the distribution and morphology as well as the type of dislocations and other defects on KDP crystals of different qualities, a brief discussion on the formation of the dislocations is given.</p> <br/>Acta Physica Sinica. 1985 34(3): 377-380. Published 2005-03-28 Author(s): CHEN JIN-CHANG, HUANG YI-SEN, WEI PEI-ZAI <br/><p>Etch pits on (100) and (001) surface of KDP crystals have been revealed by chemical etchant and optical observations. Based on the distribution and morphology as well as the type of dislocations and other defects on KDP crystals of different qualities, a brief discussion on the formation of the dislocations is given.</p> <br/>Acta Physica Sinica. 1985 34(3): 377-380. Published 2005-03-28 DISLOCATIONS IN POTASSIUM DIHYDROGEN PHOSPHATE (KDP) CRYSTALS CHEN JIN-CHANG, HUANG YI-SEN, WEI PEI-ZAI 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 377-380. article doi:10.7498/aps.34.377 10.7498/aps.34.377 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.377 377-380 //www.getgobooth.com/en/article/doi/10.7498/aps.34.381 Author(s): ZHENG JIAN-XUAN, ZENG LING-MIN <br/><p>The phase diagram of the ternary Gd-Co-Cu system with Gd content 34.8 wt% at room temperature has been determined by X-ray diffraction.The isothermal section was found to consist of five singlephase regions (i. e. α, σ,δ,γ and θ),seven two-phase regions (i. e. α+β, β+δ,δ+θ,θ+γ,γ+α,θ+α and σ+θ) and three three-phase regions (i.e.α+β+θ,α+θ+γ and β+θ+δ). No new phase has been observed. X-ray analysis showed that maximum solubility of Cu in Co is about 4wt% and maximum solubility of Gd in β-phase is about 3wt%.</p> <br/>Acta Physica Sinica. 1985 34(3): 381-383. Published 2005-03-28 Author(s): ZHENG JIAN-XUAN, ZENG LING-MIN <br/><p>The phase diagram of the ternary Gd-Co-Cu system with Gd content 34.8 wt% at room temperature has been determined by X-ray diffraction.The isothermal section was found to consist of five singlephase regions (i. e. α, σ,δ,γ and θ),seven two-phase regions (i. e. α+β, β+δ,δ+θ,θ+γ,γ+α,θ+α and σ+θ) and three three-phase regions (i.e.α+β+θ,α+θ+γ and β+θ+δ). No new phase has been observed. X-ray analysis showed that maximum solubility of Cu in Co is about 4wt% and maximum solubility of Gd in β-phase is about 3wt%.</p> <br/>Acta Physica Sinica. 1985 34(3): 381-383. Published 2005-03-28 A PHASE DIAGRAM OF THE ALLOYS OF THE TERNARY SYSTEM OF GADOLINIUM-COBALT-COPPER ZHENG JIAN-XUAN, ZENG LING-MIN 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 381-383. article doi:10.7498/aps.34.381 10.7498/aps.34.381 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.381 381-383 //www.getgobooth.com/en/article/doi/10.7498/aps.34.384 Author(s): PAN YU-YING, ZHENG JIAN-XUAN <br/><p>The neodymium-nickel binary system has been studied by X-ray diffraction method and differential thermal analysis and the phase diagram determined.In this system, the following eight intermetallic compounds were observed: Nd3 Ni (M. P. 590℃), Nd7Ni3(M. P. 616℃), NdNi (M.P.780℃), NdNi2(decomposes at 940℃),NdNi3 (decomposes at 1030℃), Nd2Ni7 (decomposes at 1234℃), NdNi5(M.P. 1420℃)and Nd2Ni17. Intermetallic compound Nd2Ni17 forms peritectically 1300℃ and decomposes through a eutectoid reaction into Ni and NdNi5 at 1250℃. Five eutectics occur: Nd-Nd3Ni (570℃,～19at%Ni), Nd3Ni-Nd7Ni3 (565℃,～27at%Ni),Nd7Ni3-NdNi (540℃,～35at%Ni),NdNi-NdNi2(720℃,56at%Ni) and Nd2Ni17-Ni (1290℃,91at%Ni). Neither Nd in Ni nor Ni in Nd shows any detectable solid solubility.</p> <br/>Acta Physica Sinica. 1985 34(3): 384-389. Published 2005-03-28 Author(s): PAN YU-YING, ZHENG JIAN-XUAN <br/><p>The neodymium-nickel binary system has been studied by X-ray diffraction method and differential thermal analysis and the phase diagram determined.In this system, the following eight intermetallic compounds were observed: Nd3 Ni (M. P. 590℃), Nd7Ni3(M. P. 616℃), NdNi (M.P.780℃), NdNi2(decomposes at 940℃),NdNi3 (decomposes at 1030℃), Nd2Ni7 (decomposes at 1234℃), NdNi5(M.P. 1420℃)and Nd2Ni17. Intermetallic compound Nd2Ni17 forms peritectically 1300℃ and decomposes through a eutectoid reaction into Ni and NdNi5 at 1250℃. Five eutectics occur: Nd-Nd3Ni (570℃,～19at%Ni), Nd3Ni-Nd7Ni3 (565℃,～27at%Ni),Nd7Ni3-NdNi (540℃,～35at%Ni),NdNi-NdNi2(720℃,56at%Ni) and Nd2Ni17-Ni (1290℃,91at%Ni). Neither Nd in Ni nor Ni in Nd shows any detectable solid solubility.</p> <br/>Acta Physica Sinica. 1985 34(3): 384-389. Published 2005-03-28 A PHASE DIAGRAM OF THE ALLOYS OF THE NEODYMIUM-NICKEL BINARY SYSTEM PAN YU-YING, ZHENG JIAN-XUAN 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 384-389. article doi:10.7498/aps.34.384 10.7498/aps.34.384 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.384 384-389 //www.getgobooth.com/en/article/doi/10.7498/aps.34.390 Author(s): FAN DE-PEI, ZHANG JIAN-ZHONG, LI JIA-JI <br/><p>It is found that the diffraction, obtained by using X-ray divergent beam technique-back reflection Kossel method, of pure and Ti-diffused LiNbO3 crystals become abnormal in the vicinity of 75℃.The Pseudo-Kossel lines of such crystal planes as (11010), (01110), (0118), (1108), (03312), (33012), are found to be severely distorted but still continuous. The pattern's distortion shows approximately two-fold symmetry about x-plane and therefore the crystal's triad axis of symmetry along x-direction is destroyed.It is also found that the distortions of pseudo-Kossel lines arising from high Bragg angle diffraction planes are smaller than those arising from lower angle diffraction planes.</p> <br/>Acta Physica Sinica. 1985 34(3): 390-395. Published 2005-03-28 Author(s): FAN DE-PEI, ZHANG JIAN-ZHONG, LI JIA-JI <br/><p>It is found that the diffraction, obtained by using X-ray divergent beam technique-back reflection Kossel method, of pure and Ti-diffused LiNbO3 crystals become abnormal in the vicinity of 75℃.The Pseudo-Kossel lines of such crystal planes as (11010), (01110), (0118), (1108), (03312), (33012), are found to be severely distorted but still continuous. The pattern's distortion shows approximately two-fold symmetry about x-plane and therefore the crystal's triad axis of symmetry along x-direction is destroyed.It is also found that the distortions of pseudo-Kossel lines arising from high Bragg angle diffraction planes are smaller than those arising from lower angle diffraction planes.</p> <br/>Acta Physica Sinica. 1985 34(3): 390-395. Published 2005-03-28 THE ANOMALOUS BACK DIFFRACTION PSEUDO-KOSSEL PATTERNS OF LiNbo3 CRYSTAL IN THE VICINITY OF 75℃ FAN DE-PEI, ZHANG JIAN-ZHONG, LI JIA-JI 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 390-395. article doi:10.7498/aps.34.390 10.7498/aps.34.390 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.390 390-395 //www.getgobooth.com/en/article/doi/10.7498/aps.34.396 Author(s): HAN FU-SEN, LU KUN-QUAN, CHANG LONG-CUN <br/><p>The EXAFS measurement needs to disperse the incident X-ray beam with monochro-mating crystal. Beside the. continuous and some characteristic spectrum from nonsynch-rotron radiation, "negative peak" sometimes occur. It will distort the signal desired. This paper reports the detailed investigation of the "negative peak" and the interpretation with X-ray multiple diffraction. Fially, the method to avoid it is discussed.</p> <br/>Acta Physica Sinica. 1985 34(3): 396-401. Published 2005-03-28 Author(s): HAN FU-SEN, LU KUN-QUAN, CHANG LONG-CUN <br/><p>The EXAFS measurement needs to disperse the incident X-ray beam with monochro-mating crystal. Beside the. continuous and some characteristic spectrum from nonsynch-rotron radiation, "negative peak" sometimes occur. It will distort the signal desired. This paper reports the detailed investigation of the "negative peak" and the interpretation with X-ray multiple diffraction. Fially, the method to avoid it is discussed.</p> <br/>Acta Physica Sinica. 1985 34(3): 396-401. Published 2005-03-28 INVESTIGATION OF“NEGATIVE PEAK”IN EXAFS MEASUREMENT HAN FU-SEN, LU KUN-QUAN, CHANG LONG-CUN 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 396-401. article doi:10.7498/aps.34.396 10.7498/aps.34.396 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.396 396-401 //www.getgobooth.com/en/article/doi/10.7498/aps.34.402 Author(s): WANG WEI-YUAN, XIA GUAN-QUN, LU JIAN-GUO, SHAO YONG-FU, QIAO YONG <br/><p>We studied the carrier profile tail formed in GaAs materials of 28Si+ implanting into Cr-doped semi-insulating substrate, including the effects of annealing temperature and time. The effects of carrier profile tail on GaAs MESFET output characteristics simulated by computer were in accord with measured results, indicating that the profile tail does make the abnormal output characteristics in MESFET. The origin of profile tail in connection with Si background in GaAs substrate and Cr redistribution during high temperature annealing was discussed.</p> <br/>Acta Physica Sinica. 1985 34(3): 402-407. Published 2005-03-28 Author(s): WANG WEI-YUAN, XIA GUAN-QUN, LU JIAN-GUO, SHAO YONG-FU, QIAO YONG <br/><p>We studied the carrier profile tail formed in GaAs materials of 28Si+ implanting into Cr-doped semi-insulating substrate, including the effects of annealing temperature and time. The effects of carrier profile tail on GaAs MESFET output characteristics simulated by computer were in accord with measured results, indicating that the profile tail does make the abnormal output characteristics in MESFET. The origin of profile tail in connection with Si background in GaAs substrate and Cr redistribution during high temperature annealing was discussed.</p> <br/>Acta Physica Sinica. 1985 34(3): 402-407. Published 2005-03-28 CARRIER PROFILE TAIL IN SILICON IMPLANTED Cr-DOPED SEMI-INSULATING GaAs SUBSTRATE WANG WEI-YUAN, XIA GUAN-QUN, LU JIAN-GUO, SHAO YONG-FU, QIAO YONG 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 402-407. article doi:10.7498/aps.34.402 10.7498/aps.34.402 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.402 402-407 //www.getgobooth.com/en/article/doi/10.7498/aps.34.408 Author(s): PENG JIN-SHENG <br/><p>A three-level atom interacting with a strong and a weak monochromatic laser is investigated by means of the dress unitary transformation technique. The two-photon process characteritics is analysed and the fluorescence spectrum of atom is presented, it is shown that they depend on both the intensity of driving field and the detuning.</p> <br/>Acta Physica Sinica. 1985 34(3): 408-413. Published 2005-03-28 Author(s): PENG JIN-SHENG <br/><p>A three-level atom interacting with a strong and a weak monochromatic laser is investigated by means of the dress unitary transformation technique. The two-photon process characteritics is analysed and the fluorescence spectrum of atom is presented, it is shown that they depend on both the intensity of driving field and the detuning.</p> <br/>Acta Physica Sinica. 1985 34(3): 408-413. Published 2005-03-28 FLUORESENCE SPECTRUM AND TWO-PHOTON PROCESSES OF A THREE-LEVEL ATOM INTERACTING WITH TWO MONOCHROMATIC LASER PENG JIN-SHENG 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 408-413. article doi:10.7498/aps.34.408 10.7498/aps.34.408 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.408 408-413 //www.getgobooth.com/en/article/doi/10.7498/aps.34.414 Author(s): XU DE-WEI, WANG XIAN-XIU, ZHAO JI-RAN, JIANG MIN-HUA <br/><p>In ZnS waveguide thin film, using the possitively mode-looked ps (aser beam and light wave coupler, phase matching between foundamental mode TE3(ω) and second harmonic mode TE3(2ω) has been obtained and third harmonic spectra was also observed. The width of the spectral curve were 1.3 and 1.4? respectively. The conversion efficiency of second harmonic is 1.8×10-3 while the incident foundamental power is 20 MW.</p> <br/>Acta Physica Sinica. 1985 34(3): 414-420. Published 2005-03-28 Author(s): XU DE-WEI, WANG XIAN-XIU, ZHAO JI-RAN, JIANG MIN-HUA <br/><p>In ZnS waveguide thin film, using the possitively mode-looked ps (aser beam and light wave coupler, phase matching between foundamental mode TE3(ω) and second harmonic mode TE3(2ω) has been obtained and third harmonic spectra was also observed. The width of the spectral curve were 1.3 and 1.4? respectively. The conversion efficiency of second harmonic is 1.8×10-3 while the incident foundamental power is 20 MW.</p> <br/>Acta Physica Sinica. 1985 34(3): 414-420. Published 2005-03-28 NONLINEAR OPTICAL EFFECTS OF POLYCRYSTALLINE WAVEGUIDE THIN FILM BY HIGH POWER LASER EXCITATION XU DE-WEI, WANG XIAN-XIU, ZHAO JI-RAN, JIANG MIN-HUA 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 414-420. article doi:10.7498/aps.34.414 10.7498/aps.34.414 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.414 414-420 //www.getgobooth.com/en/article/doi/10.7498/aps.34.421 Author(s): CHU GUI-YIN, ZHU HUA-NAN, ZHANG ZHI-GUO, FU PAN-MING, YE PEI-XIAN <br/><p>Degenerate four-wave mixing effect was studied in dye-dissolving liquid crystal iu its nematic phase. Thermal grating was generated after resonant absorption of light by the dye. The anisotropy of signal and thermal grating relaxation time were also studied.</p> <br/>Acta Physica Sinica. 1985 34(3): 421-425. Published 2005-03-28 Author(s): CHU GUI-YIN, ZHU HUA-NAN, ZHANG ZHI-GUO, FU PAN-MING, YE PEI-XIAN <br/><p>Degenerate four-wave mixing effect was studied in dye-dissolving liquid crystal iu its nematic phase. Thermal grating was generated after resonant absorption of light by the dye. The anisotropy of signal and thermal grating relaxation time were also studied.</p> <br/>Acta Physica Sinica. 1985 34(3): 421-425. Published 2005-03-28 STUDY OF DEGENERATE FOUR-WAVE MIXING IN DYE-DISSOLVING LIQUID CRYSTAL IN ITS NEMATIC PHASE CHU GUI-YIN, ZHU HUA-NAN, ZHANG ZHI-GUO, FU PAN-MING, YE PEI-XIAN 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 421-425. article doi:10.7498/aps.34.421 10.7498/aps.34.421 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.421 421-425 //www.getgobooth.com/en/article/doi/10.7498/aps.34.426 Author(s): ZHU ZHEN-HE <br/><p>We investigate how the pulse number of the set of fluctuations effects the mode-locking. The effects of the length of laser cavity on the mode-locking "window" and mode-locking threshold are als studies for Nd-glass and Nd: YAG lasers.</p> <br/>Acta Physica Sinica. 1985 34(3): 426-428. Published 2005-03-28 Author(s): ZHU ZHEN-HE <br/><p>We investigate how the pulse number of the set of fluctuations effects the mode-locking. The effects of the length of laser cavity on the mode-locking "window" and mode-locking threshold are als studies for Nd-glass and Nd: YAG lasers.</p> <br/>Acta Physica Sinica. 1985 34(3): 426-428. Published 2005-03-28 COMMENTS ON THE FLUCTUATION MODEL OF PAS-SIVELY MODE-LOCKED LASERS ZHU ZHEN-HE 2005-03-28 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1985 34(3): 426-428. article doi:10.7498/aps.34.426 10.7498/aps.34.426 Acta Physica Sinica 34 3 2005-03-28 //www.getgobooth.com/en/article/doi/10.7498/aps.34.426 426-428

map